KNOW IT ALL: Monday’s Top 7 Stories at NBC News

Image: A U.S. flag covers a sign at the entrance of the Malheur National Wildlife Refuge near Burns

A U.S. flag covers a sign at the entrance of the Malheur National Wildlife Refuge near Burns, Oregon January 3, 2016. A group of self-styled militiamen occupied the headquarters of a U.S. wildlife refuge in eastern Oregon in a standoff with authorities, officials and local media reports said on Sunday, in the latest dispute over federal land use in the West. = JIM URQUHART / Reuters

Good morning. Here are some of the stories we're following today:

1. FBI Seeks 'Peaceful' End to Oregon Standoff

The FBI was leading efforts early Monday to bring a "peaceful" end to a standoff with armed protesters who occupied the Malheur National Wildlife Refuge headquarters in Oregon on Saturday. Ammon and Ryan Bundy — sons of ranchers' rights activist Cliven Bundy — were among the protesters, who are looking for federal land to be turned over to local authorities so it can be used for ranching and other public purposes. Read more in NEWS.

What Do the Armed Oregon Protesters Occupying a Federal Building Want? 2:10

2. Saudi Arabia Cuts Diplomatic Relations With Iran

Regional rivals Saudi Arabia and Iran have been trading blows in an escalating war of words since Saturday, following Saudi Arabia's move to execute prominent Shiite opposition cleric Sheikh Nimr al-Nimr. The tensions escalated over the weekend when Saudi Arabia severed diplomatic ties with Iran, saying the country's condemnation of the execution showed it supports terrorism. Read more in NEWS.

3. East Braces for First Cold Spell of Season

An Arctic front pushed into the Great Lakes, Ohio Valley and Northeast on Sunday, just about a week after many parts of the region experienced the warmest Christmas Eve on record. High temperatures on Monday and Tuesday will range from 5 to 10 degrees colder than early January averages from the eastern Great Lakes to New England. Read more in WEATHER.

4. Chinese Markets Halt Trading After Shares Plunge

The Shanghai Composite tumbled 6.85 percent to 3296.66 and the Shenzhen Composite plunged 8.1 percent after feeble manufacturing surveys revived concerns over the mainland's economic slowdown. The plummet incited a trading halt for the rest of the session. Read more in ECONOMY.

5. Earthquake Shakes India-Myanmar Border

One person was reported dead and a dozen people were injured when a magnitude 6.7 earthquake struck near the India-Myanmar border early Monday. Residents reported shaking that lasted up to two minutes and loss of power. Read more in NEWS.

6. Clinton Takes on Heckler at Campaign Event

During Hillary Clinton's first campaign event of 2016, a woman in the crowd repeatedly shouted a question at Clinton, who responded: "You are very rude and I'm not gonna ever call on you." The woman later told NBC News that she is New Hampshire State Rep. Katherine Prudhomme O'Brien and was attempting to ask a question about past accusations of sexual impropriety against former President Bill Clinton. Read more in POLITICS.

7. Pastor Disarms Vet During New Year's Service

A man holding a rifles and a magazine entered a North Carolina church on Thursday night, prompting a startled pastor to ask: "Can I help you?" The man gave the rifle to the pastor, Bishop Larry Wright, who patted the man down and allowed him to sit in a pew near the pulpit for the rest of the service. The man was facing some challenges and returned to the church Sunday to thank Wright. Read more in NEWS.

Nightly Spotlight

Dutch entrepreneur Boyan Slat wants to build the largest floating barrier ever deployed and use the ocean’s own currents to capture plastic to clean up the massive Pacific garbage patch.

This 21-Year-Old May Have Invented a Way to Clean Up Our Oceans 2:10