Anger is growing in Libya over the spread of illegal weapons and the interim government's inability to control armed groups.<br /><br />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.<br /><br />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.<br /><br />Al Jazeera's Omar Al Saleh reports from Tripoli.