More than 1,000 anti-government protesters have been marched through Yemen's capital for a fourth consecutive day, demanding political reforms and the removal of the US-allied president.
University students, rights activists, and politicians were met in Sana'a by a counter-demonstration from dozens of supporters holding up pictures of President Ali Abdullah Saleh.
They confronted the protesters, shouting slogans against terrorism and supporting the government's call for dialogue.
Police separated the two groups before the protesters marched toward the city centre shouting "Leave Saleh."
Lawyers in black robes, led by their union head, joined the demonstrators shouting "People want the regime to step down" and chanting slogans directed against the security forces.