People continue to demand justice for 20-year-old Wright

Demonstrations continued for a third night in Brooklyn Center in the US state of Minnesota after Duante Wright's death, a black man whom a white police officer shot during a traffic stop.

Hundreds of protesters gathered at the heavily guarded police headquarters on Tuesday, where police stood guard in riots and the national guard's soldiers.

After the evening, numerous protesters threw bottles and other projectiles over a fence in front of police headquarters.

State police have declared the rally illegal and ordered the crowds to disperse before 10 pm. The announcement sparked clashes between police and protesters.

Protesters set off fireworks and threw objects at police, who fired tear gas, non-lethal rounds and lightning rounds and tried to force the crowd back, US media reported.

The third night of protests was held on the same day as the Minneapolis police officer who fatally wounded 20-year-old Wright and the police chief who called the murder an apparent accident both resigned in the wake of civil unrest.

The mayor of Brooklyn Center, Minnesota, said the two stopped one day after the chief told news reporters that the officer who shot Wright accidentally pulled out her gun when she grabbed her Taser.

Mayor Mike Elliott said the city council has passed a resolution calling for both Tim Gannon and the officer, Kim Potter, to be fired.

"I hope it will bring some peace to the community," Elliott said, adding that he had not yet accepted Potter's resignation, leaving the door open to fire her. "We want to send a message to the community that we take this situation seriously."

Elliott expressed sympathy with protesters, who he said were motivated by fear rather than lawlessness.

"What I saw were young people, many of whom looked alike - all look like Daunte," Elliott said. “And I could feel their pain. I could feel their anger. I feel their fear. ”