Yemen has declared a state of emergency after a massacre at an anti-government rally.
More than 40 people were killed and at least 300 others injured when plainclothes police reportedly opened fire on protesters after Friday prayers.
President Ali Abdullah Saleh described it as a tragedy and blamed the violence on people within the crowd who were carrying weapons.
“I express my extreme sorrow for what happened today after Friday prayers in the university district,” Saleh told a news conference in Sanaa.
Yemen is the second country in the region to declare emergency rule this week after Bahrain introduced martial law – a move immediately followed by a massive crackdown on demonstrators.
But it is unclear whether Yemen’s president has the military power to enforce such an order, with the country deeply divided and racked by weeks of protests in which more than 70 people have been killed.