Curfews have been ordered in cities across the US to try to stem unrest sparked by the death of a black man in police custody.
But they have been defied in many areas, with shops looted, cars burned and buildings attacked. Riot police have used tear gas and rubber bullets.
President Donald Trump urged “healing” over the death of George Floyd but said he could not allow mobs to dominate.
A white ex-policeman is charged with murdering Mr Floyd, 46, in Minneapolis.
Derek Chauvin, 44, is due to appear in court on Monday.
In video footage, Mr Chauvin can be seen kneeling on Mr Floyd’s neck for several minutes on Monday. Mr Floyd repeatedly says that he is unable to breathe.