Soldiers in Yemen's capital have fired shots into the air to stop thousands of anti-government protesters from clashing with supporters of the president.
President Ali Abdullah Saleh has said he is ready to meet their demand to step down, but only when it was "safe" to do so - as he does not trust the opposition.
There have been fears of further violence in the city of Sanaa a week after security forces shot dead more than 40 demonstrators.
With anti-government protests also gathering momentum in Syria, there are reports of further unrest across the Middle East.
In Bahrain, the funeral took place of a man whose relatives say he was shot four times by security forces for opposing the royal family there.
Security is tight around the island of the east coast of Saudi Arabia following a month of demonstrations.
Government forces fired tear gas at protesters after a prominent cleric in the country said "brutal force" was being used to put down the opposition.
Jordan's prime minister has warned against further protests in capital Amman, saying it was the "beginning of chaos" and is unacceptable.
Activists clashed with government supporters in the centre of the city, pelting each other with stones.
Security forces charged in and beat protesters, reportedly killing one.