Tear gas has been fired and a curfew imposed amid angry protests after police fatally shot a black man in a traffic stop in the US city of Brooklyn Center, just north of Minneapolis.
The man has been identified by relatives as 20-year-old Daunte Wright.
Police Chief Tim Gannon has told media the shooting was accidental.
“It is my belief the officer meant to deploy their Taser but shot him with a single bullet,” he said on Monday morning.
The officer is now on administrative leave while an investigation is carried out.
Brooklyn Center’s mayor issued a curfew that lasted until 06:00 (11:00 GMT), telling people to “be safe, go home”.
Tensions in Minneapolis are high as the trial of a former officer accused of killing George Floyd takes place.
A courtroom just 10 miles (16km) from the latest unrest will resume proceedings on Monday, with the prosecution expected to wrap up its case and the defence of the ex-officer, Derek Chauvin, to begin.