Protests erupted in the US state of Wisconsin after police fired multiple shots at a black man in response to what they said was a domestic incident.
The man, who was identified as Jacob Blake, is in a hospital in serious condition.
The video posted online appears to show Mr. Blake being shot in the back as he tries to get into a car in Kenosha town.
The Kenoshi authorities declared an emergency nighttime curfew after riots erupted after the shooting.
On Sunday evening, hundreds of people marched towards the police building. According to media reports, the cars were set on fire and the police used tear gas.
The curfew in the city is valid until 07:00 Monday (12:00 GMT).