TRIPOLI, Libya (AP) — Libyan militias are not backing down from their protests outside government buildings despite passage of a sweeping law that bans from government positions officials who served in senior posts under the former regime.

Trucks bearing mounted machine guns stood outside the Justice and Foreign Ministry buildings on Monday, with gunmen raising signs demanding the resignation of Prime Minister Ali Zidan.

Parliament passed the Political Isolation Law under pressure from militias Sunday. The law could remove Zidan from power.

Zidan, who is popular among many, has angered militias by calling on them to join the government's security forces. He has vowed to take a hardline stand against armed groups that do not fall in line.

He also threatened to summon outside help to confront the armed groups.