Unrest in Yemen turned ugly as protesters clashed with police and government loyalists in Sanaa on the fourth consecutive day of rallies.
Thousands of protesters demanding the resignation of President Ali Abdullah Saleh came up against a smaller crowd backing the veteran leader.
The protesters could be heard chanting “After Mubarak, Ali”, in reference to the recent dramatic events in Egypt.
Police fired tear gas and stones were thrown, with reports of injuries.
Clashes also broke out during an anti-government protest in the Yemeni city of Taez, to the south of the capital.
The Middle East has seen a wave of anti-government protest this year, which began with the overthrow of Tunisia’s President, Zine al-Abidine Ben Ali, last month and reached a new height at the weekend, when Hosni Mubarak of Egypt resigned.
On Monday, violence erupted at an opposition rally in the Iranian capital Tehran, while in Bahrain, security forces fired tear gas and rubber bullets to disperse dozens of protesters in the capital, Manama.