Quentin Sommerville witnesses Chinese security forces hitting protesters
A night-time curfew has been reimposed in the restive western Chinese city of Urumqi, officials have announced.
The curfew had been suspended for the last two days after officials said they had the city under control.
Mosques in the city were ordered to remain closed on Friday - but at least two opened at the request of crowds of Muslim Uighurs that gathered outside.
The city remains tense after Sunday's outbreak of ethnic violence that killed 156 people and wounded more than 1,000.
Thousands of people - both Han Chinese and Uighurs - are reportedly trying to leave the city.
The BBC's Quentin Sommerville, who is in Urumqi, said the authorities announced the city would be under curfew on Friday from 1900 local time (1100GMT).
'Safety is paramount'
News of the curfew came as hundreds of Muslim Uighurs defied an order to stay at home for Friday prayers.
Quentin Sommerville, BBC News, Urumqi