Anger is growing in Libya over the spread of illegal weapons and the interim government's inability to control armed groups.

A funeral procession for a security force member who was killed during Tuesday's attack on the prime minister's office, turned into a protest against lawlesssness.

Among the mourners was the prime minister himself, not only to offer his condolences but also to harden publicly his stand against armed groups that are threatening the state.

Al Jazeera's Omar Al Saleh reports from Tripoli.