msnbc.com staff and news service reports
updated 6/16/2011 12:05:12 AM ET 2011-06-16T04:05:12

An apparent NATO airstrike again targeted the area near Moammar Gadhafi's compound during a pre-dawn raid in the Libyan capital Tripoli.

At least two thunderous booms were heard in quick succession shortly before 5 a.m. Thursday in the capital. A column of smoke could be seen rising from the vicinity of the Libyan leader's Bab al-Aziziya compound.

It was not clear what was hit. Government officials did not immediately comment on the strike.

NATO warplanes have repeatedly targeted the area in and around the compound, which sits in the heart of Tripoli.

Earlier Wednesday, Libyan rebels pushed deeper into government-held territory south of the capital, but their advance came as strains began to emerge in the Western alliance trying to topple Moammar Gadhafi.

In Washington, a bipartisan group of lawmakers is suing President Barack Obama for taking military action against Libya without war authorization from Congress.

Fighters in the Western Mountains, a rebel stronghold about 90 miles southwest of Tripoli, built on gains made in the past few days by taking two villages from which pro-Gadhafi forces had for months been shelling rebel-held towns.

But the rebels are still a long way from Gadhafi's main stronghold in Tripoli, while their fellow fighters on the other two fronts — in Misrata and in eastern Libya — have made only halting progress against better-armed government troops.

"The revolutionaries (rebels) now control Zawiyat al-Babour and al-Awiniyah after pro-Gadhafi forces retreated this morning from the two villages," Abdulrahman, a rebel spokesman in the nearby town of Zintan, told Reuters.

Libyan state TV said on Wednesday a NATO bombardment had killed 12 people in a convoy in the town of Kikla, 90 miles southwest of Tripoli. A NATO official denied the report, saying: "There was no strike in Kikla by NATO today."

The rebels seized the town on Tuesday after government troops fell back.

Ties are becoming strained in the NATO alliance, with some NATO members complaining that others have been reluctant to commit additional resources needed to sustain the bombing mission in the coming months.

Adding to the pressure, lawmakers in the Congress are pressing Obama to explain the legal grounds on which he was keeping U.S. forces involved in Libya without the authorization of Congress.

In response, the White House sent lawmakers a detailed report Wednesday outlining the objectives of U.S. military involvement in Libya and making a legal case for continuing the campaign. The Obama administration said U.S. military action in Libya does not require congressional authorization because American forces are now playing a support role.

Senior administration officials said the White House believes that because U.S. forces are not engaged in sustained fighting and there are no troops on the ground in Libya, the president has the authority to direct the mission.

Cameron: 'Time is on our side'
Speaking in London after meeting NATO Secretary General Anders Fogh Rasmussen, British Prime Minister David Cameron reiterated that time was running out for Gadhafi and that the alliance was as determined as ever.

"I think there is a very clear pattern emerging which is time is on our side, because we have the support of NATO, the United Nations, the Arab League, a huge number of countries in our coalition and in our contact group," he said.

Rasmussen echoed those comments despite senior NATO commander General Stephane Abrial on Tuesday raising questions about the alliance's ability to handle a long-term intervention.

As NATO reportedly resumed its airstrikes on Tripoli late Tuesday, a London newspaper said Gadhafi's son, who heads the country's Olympic committee, received nearly 1,000 tickets to London's 2012 Olympic Games.

Responding to the report in Britain's Daily Telegraph, a spokeswoman for London 2012 said Libya has been given hundreds of tickets to the events, but noted the tickets went to Libya's Olympic Committee — "not an individual" — for distribution to sports organizations and athletes.

Olympic tickets
The London Olympic organizing committee is obliged to give tickets to any of the International Olympic Committee member states who request them.

But key members of Gadhafi's regime are under travel bans and there is no indication the Libyan leader or his son plan to — or could — attend the Olympics.

According to the Daily Telegraph report, organizers have privately expressed fears that Gadhafi could crash the games using the allocated tickets. But a U.K. government spokesman told the newspaper that Gadhafi wouldn't be allowed to attend because of both an international travel ban placed on him and the International Criminal Court's warrant for his arrest.

The Daily Telegraph also reported people inside the U.K. government sought out guidance on how to prevent dictators, such as Gadhafi and Robert Mugabe of Zimbabwe, from attending the games in an effort to avoid diplomatic spats. The newspaper reported that authorities offered reassurance by noting that travel bans placed on such figures would render the issue moot.

Story: Libyan troops fire rockets into Tunisia

East of Tripoli, alliance aircraft have begun dropping leaflets warning government troops to abandon their posts outside Zlitan, which lies just west of the rebel-held port city of Misrata.

Rebel forces have been advancing along the Mediterranean coast toward Zlitan, but say they have been instructed by NATO to withdraw ahead of expected bombing runs to old front lines in Dafniya.

The 3-by-5 inch leaflets intended for forces loyal to Gadhafi carry the NATO symbol and a picture of an Apache attack helicopter and burning tanks on one side. Green Arabic writing warns: "There's no place to hide. It's not too late to stop fighting. If you continue to threaten civilians, you will face destruction." The message on the reverse urges soldiers to "stop and stay away from fighting now."

An Associated Press reporter near the front line said NATO fighter jets could be heard overhead.

Battle for Zlitan
If the rebels take Zlitan, they would be within 85 miles of the eastern outskirts of Tripoli. A rebel official said opposition leaders in Zlitan have been meeting with their counterparts in Misrata, but he acknowledged they face challenges in advancing on the city.

"We need the people of Zlitan to push more courageously forward. They are dependent on our movements, but the problem is only a third of that city is with the rebels," said Ibrahim Beatelmal, a rebel military spokesman in Misrata.

NATO's nearly three-month air campaign has grounded Gadhafi's air forces and weakened his military capabilities. But there are more signs the pace of operations has put a strain on the trans-Atlantic alliance.

In London, the head of the Royal Navy warned that the British fleet — a key contributor to the Libya mission — will be unable to maintain the pace of operations if the mission drags on until the end of the year.

Adm. Mark Stanhope told reporters Monday he was comfortable with NATO's decision to extend the Libya operation to the end of September, but said that beyond that the government would need to make "challenging decisions."

"If we do it longer than six months we will have to reprioritize forces," he said.

Elsewhere, a senior NATO official said coalition resources would become "critical" if intervention in Libya continues.

"If additional resources are needed, this of course will need a political decision," said the official, Gen. Stephane Abrial, Supreme Allied Commander Transformation.

The Associated Press contributed to this report.

Photos: Libya's uprising against Gadhafi

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  1. People gathering in Benghazi, Libya in mid-February of 2011 as protest against the rule of Moammar Gadhafi grew, in part triggered by the arrest of human rights activist Fethi Tarbel. EDITOR'S NOTE: The content, date and location of this image could not be independently verified. (AP) Back to slideshow navigation
  2. Buildings at the entrance to a security forces compound burn in Benghazi, Feb. 21, 2011. Libyan protesters celebrated in the streets of Benghazi, claiming control of the country's second largest city after bloody fighting, and anti-government unrest spread to the capital with clashes in Tripoli's main square for the first time. (Alaguri / AP) Back to slideshow navigation
  3. Libyan leader Moammar Gadhafi speaks on state television. Feb. 22, and signalled his defiance over a mounting revolt against his 41-year rule. (Libya TV via Reuters) Back to slideshow navigation
  4. Libyan U.N. ambassador Shalgham is embraced by Dabbashi, Libya's deputy U.N. Ambassador after denouncing Libyan leader Moammar Gadhafi for the first time during a Security Council meeting at the headquarters of the United Nations in New York on Feb. 25. Shalgam, a longtime friend and member of Gadhafi's inner circle, had previously refused to denounce Gadhafi. (Reuters) Back to slideshow navigation
  5. Thousands of Libyans gather for the Muslim Friday prayers outside the courthouse in the eastern city of Benghazi on Feb. 25, 2011. Perhaps 8,000 people gathered for the midday prayers with a local imam, who delivered his sermon alongside the coffins of three men killed in the violent uprising that routed Gadhafi loyalists from Benghazi. (Gianluigi Guercia / AFP - Getty Images) Back to slideshow navigation
  6. Rebels hold a young man at gunpoint, who they accuse of being a loyalist to Gadhafi, between the towns of Brega and Ras Lanuf, March 3, 2011. (Goran Tomasevic / Reuters) Back to slideshow navigation
  7. Pro-Gadhafi soldiers and supporters gather in Green Square in Tripoli, March 6, 2011. Thousands of Moammar Gadhafi's supporters poured into the streets of Tripoli, waving flags and firing their guns in the air in the Libyan leader's main stronghold, claiming overnight military successes. (Ben Curtis / AP) Back to slideshow navigation
  8. Rebel fighters jump away from shrapnel during heavy shelling by forces loyal to Gadhafi near Bin Jawad, March 6. Rebels in east Libya regrouped and advanced on Bin Jawad after Gadhafi forces ambushed rebel fighters and ejected them from the town earlier in the day. (Goran Tomasevic / Reuters) Back to slideshow navigation
  9. Libyan rebel fighters take cover as a bomb dropped by an airforce fighter jet explodes near a checkpoint on the outskirts of the oil town of Ras Lanuf on March 7, 2011. (Marco Longari / AFP - Getty Images) Back to slideshow navigation
  10. Libyan rebels fire rockets at government troops on the frontline. March 9, 2011 near Ras Lanuf. The rebels pushed back government troops westward towards Ben Jawat. (John Moore / Getty Images) Back to slideshow navigation
  11. Libyan government soldiers aboard tanks at the west gate of the town Ajdabiyah March 16, 2011. Libya's army pounded an opposition-held city in the country's west and battled fighters trying to block its advance on a rebel bastion in the east amid flagging diplomatic efforts to end the bloodshed. EDITOR'S NOTE: Picture taken on a government guided tour. (Ahmed Jadallah / Reuters) Back to slideshow navigation
  12. Libyan people in Benghazi celebrate after the United Nations Security Council authorized a no-fly zone over Libya, March 18. Thousands of Libyans erupted in cheers as the news flashed on a giant screen in besieged Benghazi late March 17. After weeks of discussion, the UN Security Council banned flights in Libya's airspace and authorized "all necessary means" to implement the ban, triggering intervention by individual countries and organizations like NATO. (EPA) Back to slideshow navigation
  13. A picture combo shows a Libyan jet bomber crashing after being apparently shot down in Benghazi on March 19, 2011 as the Libyan rebel stronghold came under attack. Air strikes and sustained shelling of the city's south sent thick smoke into the sky. (Patrick Baz / AFP - Getty Images) Back to slideshow navigation
  14. Residents of Benghazi flee the city along the road toward Tobruk, in an attempt to escape fighting in their city, March 19, 2011. Gaddafi's troops pushed into the outskirts of Benghazi, a city of 670,000 people, in an apparent attempt to pre-empt Western military intervention expected after a meeting of Western and Arab leaders in Paris. (Reuters TV) Back to slideshow navigation
  15. Vehicles belonging to forces loyal to Gadhafi explode after an air strike by coalition forces, along a road between Benghazi and Ajdabiyah March 20, 2011. (Goran Tomasevic / Reuters) Back to slideshow navigation
  16. A rebel fighter carries his weapon outside the northeastern Libyan town of Ajdabiyah, March 21, 2011. A wave of air strikes hit Gaddafi's troops around Ajdabiyah, a strategic town in the barren, scrub of eastern Libya that rebels aim to retake and where their fighters said they need more help. (Finbarr O'reilly / Reuters) Back to slideshow navigation
  17. A Libyan rebel prays next to his gun on the frontline of the outskirts of the city of Ajdabiya, south of Benghazi, March 21, 2011. The international military intervention in Libya is likely to last "a while," a top French official said, echoing Moammar Gadhafi's warning of a long war ahead as rebels, energized by the strikes on their opponents. (Anja Niedringhaus / AP) Back to slideshow navigation
  18. Libyan rebels retreat as mortars from Gadhafi's forces are fired on them near the outskirts of the city of Ajdabiya, March 22, 2011. Coalition forces bombarded Libya for a third straight night, targeting the air defenses and forces of Libyan ruler Moammar Gadhafi, stopping his advances and handing some momentum back to the rebels, who were on the verge of defeat. (Anja Niedringhaus / AP) Back to slideshow navigation
  19. A Libyan man is comforted by hospital staff as he reacts after identifying his killed brother in the morgue of the Jalaa hospital in Benghazi, March 22, 2011. His brother was killed earlier in fighting around the city of Ajdabiya. (Anja Niedringhaus / AP) Back to slideshow navigation
  20. Volunteer fighters training at a rebel army training camp in Benghazi, March 29, 2011. Pro-government forces intensified their attacks on Libyan rebels, driving them back over ground they had taken in recent days. The rebels had reached Nawfaliya, but pulled back to Bin Jawad. (Manu Brabo / EPA) Back to slideshow navigation
  21. Smoke billows as seven explosions were reported in the tightly-guarded residence of leader Moammar Gadhafi and military targets in the suburb of Tajura. Two explosions also rocked the Libyan capital Tripoli on March 29, 2011, as NATO-led coalition aircraft had been seen in the skies over the capital. (Mahmud Turkia / AFP - Getty Images) Back to slideshow navigation
  22. A Libyan rebel urges people to leave, as shelling from Gadhafi's forces started landing on the frontline outside of Bin Jawaad, 93 miles east of Sirte, March 29, 2011. (Anja Niedringhaus / AP) Back to slideshow navigation
  23. General Abdel-Fattah Younis, former interior minister in the Gadhafi regime who defected in the early days of the uprising, is greeted by Libyan rebels at the front line near Brega, April 1, 2011. (Altaf Qadri / AP) Back to slideshow navigation
  24. Libyan men show the V-sign for victory as they stand on the deck of a Turkish ship arriving from Misrata to the port of Benghazi who were evacuated along with others the injured in the fighting between rebel and Gadhafi forces, April 03, 2011. The Turkish vessel took hundreds of people wounded in the Libyan uprising for treatment in Turkey from the two cities of Misrata and Benghazi. (Mahmud Hams / AFP - Getty Images) Back to slideshow navigation
  25. A wounded prisoner from Gadhafi's forces is transported in the back of a pickup truck by rebels, on the way to a hospital for treatment, half way between Brega and Ajdabiya, April 9, 2011. Rebels say they took two prisoners after a clash with soldiers near Brega's university outside the government-controlled oil facilities, marking a noticeable advance by rebels. (Ben Curtis / AP) Back to slideshow navigation
  26. In this image taken from TV, Libyan leader Moammar Gadhafi makes a pubic appearance in Tripoli, April 14 2011. Gadhafi defiantly waved at his supporters while being driven around Tripoli while standing up through the sunroof of a car. (AP) Back to slideshow navigation
  27. A rebel fighter celebrates as his comrades fire a rocket barrage toward the positions of government troops April 14, 2011, west of Ajdabiyah. (Chris Hondros / Getty Images) Back to slideshow navigation
  28. Gadhafi supporters hold copies of his portrait as they gather at the Bab Al Azizia compound in Tripoli, April 15, 2011. Rebels held much of eastern Libya by mid-April, while Gadhafi controlled the west, with the front line shifting back and forth in the middle. (Pier Paolo Cito / AP) Back to slideshow navigation
  29. Doctors work on a baby who suffered cuts from shrapnel that blasted through the window of his home during fighting in the besieged city of Misrata, April 18, 2011. Thousands of civilians are trapped in Misrata as fighting continues between Libyan government forces that have surrounded the city and anti-government rebels there. The Libyan government has come under international criticism for using heavy weapons and artillery in its assault on Misrata. (Chris Hondros / Getty Images) Back to slideshow navigation
  30. MISRATA, LIBYA - APRIL 20: Libyan rebel fighters discuss how to dislodge some ensconced government loyalist troops who were firing on them from the next room during house-to-house fighting on Tripoli Street in downtown Misrata April 20, 2011 in Misrata, Libya. Rebel forces assaulted the downtown positions of troops loyal to Libyan strongman Moammar Gaddafi April 20, briefly forcing them back over a key bridge and trapping several in a building that fought back instead of surrendering, firing on the rebels in the building and seriously wounding two of them during the standoff. Fighting continues between Libyan government forces that have surrounded the city and anti-government rebels ensconced there. (Photo by Chris Hondros/Getty Images) (Chris Hondros / Getty Images) Back to slideshow navigation
  31. Libyan rebel fighters carry out a comrade wounded during an effort to dislodge some ensconced government loyalist troops who were firing on them from a building during house-to-house fighting on Tripoli Street in downtown Misrata April 20, 2011. Rebel forces assaulted the downtown positions of troops loyal to Gaddafi, briefly forcing them back over a key bridge and trapping several in a building where they fought back instead of surrendering. Two rebels were seriously wounded during the standoff. (Chris Hondros / Getty Images) Back to slideshow navigation
  32. Rebels tread carefully as they prepare to invade a house where soldiers from the pro-government forces had their base in the Zwabi area of Misrata on April 24, 2011. (Andre Liohn / EPA) Back to slideshow navigation
  33. Libyans inspect damage and an unexploded missile at the Gadhafi family compound in a residential area of Tripoli, May 1, 2011. Gadhafi escaped a NATO missile strike in Tripoli that killed one of his sons and three young grandchildren. EDITOR'S NOTE: Photo taken on a government guided tour. (Darko Bandic / AP) Back to slideshow navigation
  34. Moammar Gaddafi's son Saif al-Islam Gadhafi, center, leaves the funeral of his brother Saif Al-Arab Gadhafi, who was killed during air strikes by coalition forces, at the El Hani cemetery in Tripoli, May 2, 2011. Crowds chanting Gadhafi's name gathered in Tripoli for the funeral of his son and three grandchildren. (Louafi Larbi / Reuters) Back to slideshow navigation
  35. Fleeing migrants and Libyans are seen on board an International Organization of Migration ship leaving the port of Misrata on May 4, 2011, as Gadhafi forces continued to pound the city. (Christophe Simon / AFP - Getty Images) Back to slideshow navigation
  36. Libyan men watch as the main fuel depot in Libya's third largest city, Misrata, burns following a bombing by Gadhafi's forces on May 7, 2011. Libyan regime forces shelled fuel depots in Misrata and dropped mines into its harbor using helicopters bearing the Red Cross emblem, rebels said as they braced for a ground assault. (Ricardo Garcia Vilanova / AFP - Getty Images) Back to slideshow navigation
  37. Libyan rebels celebrate near the airport of Misrata on May 11, 2011 after capturing the city's strategic airport following a fierce battle with Moammar Gadhafi's troops -- their first significant advance in weeks. (Ricardo Garcia Vilanova / AFP - Getty Images) Back to slideshow navigation
  38. Women react after a protest against Moammar Gadhafi's regime in Benghazi, Libya, on May 16, 2011. Luis Moreno-Ocampo, prosecutor of the International Criminal Court in The Hague, announced that he would seek arrest warrants against the leader of Libya, Moammar Gadhafi, his son Seif al-Islam and the country's intelligence chief on charges of crimes against humanity. (Rodrigo Abd / AP) Back to slideshow navigation
  39. Tripoli street in Misrata is seen from the terrace of a building used by Gadhafi’s snipers before the rebels took control of the area on May 22, 2011. The weeks-long siege of the city ended in mid-May and Tripoli Street was the site of the fiercest fighting in the battle and a turnin point in the war. (Rodrigo Abd / AP) Back to slideshow navigation
  40. A rebel fighter gives water to a soldier loyal to Gadhafi after he was wounded and then captured near the front line, west of Misrata on May 23, 2011. (Rodrigo Abd / AP) Back to slideshow navigation
  41. An uncle, left, prays over the body of one and a half year-old Mohsen Ali al-Sheikh during a washing ritual during the funeral at his family's house in Misrata, May 27, 2011. The child was killed by a gunshot during clashes between rebels and pro-Gadhafi forces earlier in the day. (Wissam Saleh / AP) Back to slideshow navigation
  42. The body of a drowned refugee floats near a capsized ship which was transporting an estimated 850 refugees from Libya, approximately 22 miles north of the Tunisian islands of Kerkennah, June 4, 2011. At least 578 survived the sinking. (Lindsay Mackenzie / AP) Back to slideshow navigation
  43. A photograph taken from a video by a National Transitional Council (NTC) fighter shows Mutassem Gadhafi, son of Moammar Gadhafi, drinking water and smoking a cigarette following his capture and shortly before his death, in Sirte, Oct. 20, 2011. (- / AFP - Getty Images) Back to slideshow navigation
  44. A photograph taken from mobile phone video of a National Transitional Council (NTC) fighter shows the capture of Moammar Gadhafi in Sirte on Oct. 20, 2011. (AFP - Getty Images) Back to slideshow navigation
  45. This image provided by the Libyan Youth Group on Nov. 19, 2011, shows Seif al-Islam Gadhafi after he was captured near the Niger border with Libya. Moammar Gadhafi's son, the only wanted member of the ousted ruling family to remain at large, was captured as he traveled with aides in a convoy in Libya's southern desert. (AP) Back to slideshow navigation
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Video: Heavy fighting continues in Libya

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