On Tuesday riot police were once again on the streets of the western Chinese city of Urumqi to deal with ethnic Uighur protesters.
About 200 Uighurs, many of them women, gathered to protest against the arrest of 1,400 people after deadly violence on Sunday.
The protest was witnessed by foreign journalists during a tour led by government officials. The BBC's Quentin Sommerville in Urumqi called it an extraordinary act of defiance.
The women shouted: "Give us our freedom, give us back our men."
Reports from Urumqi say the police have gone from house to house, rounding up young men for questioning. They say they have arrested the "ringleaders" of Sunday's violence, but are seeking others.
The protesters began to leave when the journalists were ushered away. But policemen were waiting in the sidestreets, and it was not clear what happened to the woman afterwards.
Later, groups of ethnic Han Chinese marched through the city carrying clubs, machetes and makeshift weapons, such as spades.
They said they were protesting against violence carried out by the Uighurs. They were dispersed by the security forces, who fired tear gas.
The government has blamed separatist Uighurs based abroad for orchestrating attacks on ethnic Han Chinese. Officials say 156 people died in Sunday's violence, and more than 1,000 were injured.
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