Galvanized by anger over the killing of the popular American ambassador here last week, thousands of Libyans marched through this city on Friday, demanding the disarming of the militias that have refused to disband since overthrowing the country's dictator, Col. Gadaffi.

In a show of mass frustration at the armed groups, protesters seized control of several militia headquarters on Friday night and handed them over to Libya's national army in what appeared to be a coordinated sweep.

They also stormed the headquarters of Ansar al-Sharia, a hard-line Islamist militia that has been linked to the attack.

(READ the story in the NY Times)