About 200 former rebel fighters in Libya have besieged the prime minister's office, demanding that he resign.
The militia members, who did not threaten violence, want prime minister Ali Zidan to step down in accordance with a political isolation law banning members of the former regime from political life.
He served as an ambassador under Muammar Gaddafi, who was ousted in an eight-month civil war.
The law is controversial because it bans anyone who worked with Gaddafi from 1969 until he was killed in 2011.
The prime minister's convoy was seen moving around the capital, Tripoli, last week with more security guards than usual - after an influx of militias from around the country.