Nightly News | September 16, 2012
>> to the lingering questions over what exactly happened in and around the u.s. consulate in benghazi , libya , the night four americans were killed, including the u.s. ambassador . aman mohadin is in benghazi once again for us tonight. good evening.
>> reporter: good evening, lester . well, the investigation into the killing of the americans here in benghazi intensifies. today there was a powerful message for greater unity in the region as protests continued against the american-made anti-islam preliminary.
>> reporter: a prayer for peace in the heart of the middle east . pope benedict holding sunday mass in front of 300,000 worshippers. his message? reconciliation and tolerance. but there was little of either today as the demonstrations continued. also in lebanon today hundreds took to the streets in an anti-american protest. in pakistan hundreds of protesters clashed with police after demonstrators broke through a barrier near the u.s. consulate in karachi. protesters set american flags on fire. more than 100 people were arrested in paris while hundreds more gathered today in london. in tunisia where the protests were the most violence, nbc staff was evacuated, and 50 u.s. marines were deployed to secure the embassy compound there, and in libya in benghazi where four americans were killed, libyan fifltz continue to round up individuals who might have information on the attack. today on nbc's "meet the press" the u.s. ambassador to the united nations offered this explanation for the benghazi attack.
>> what happened in benghazi was, in fact, initially a spontaneous reaction to what had just transpired hours before in cairo.
>> reporter: but libya 's president had a different assessment, saying this was a preplanned assault with foreign help, possibly from al qaeda .
>> some of them are libyans. others are -- came from outside.
>> reporter: as the region braces for more protests and violence, it's unclear tonight whether pope benedict 's message of peace will resonate. lester , as the investigation here intensifies, more suspects are being rounded up by libyan officials and so, too, is the intelligence. the question now is whether the government or the u.s. is going to act to bring these perpetrators to justice. lester .
>> aman, thank you.