Protests have broken out and police responded with tear gas after an 18-year-old man was shot dead in a confrontation with officers in St Louis, Missouri.
The city is close to the trouble spot of Ferguson, where a police killing of an unarmed black man last year prompted angry protests and a renewed discussion on race and policing in the United States.
After the shooting Wednesday, in which police say the 18-year-old pointed a gun at police, protesters gathered near the shooting location.
St Louis Police Chief Sam Dotson said they threw bottles and bricks at police and refused to move from an intersection.
After other attempts to clear the area failed, Dotson said tear gas was used to reopen the intersection.
"Peace was restored after a total of nine arrests," he said, adding that video of the incident would be released soon.
Later at night, police received reports of burglaries and a car being set on fire in the area.
"A group of protesters came together and started to do acts of violence directed not only towards law enforcement but towards the neighbourhood," Dotson said in recorded remarks released by the police department.
He reported that police discovered three stolen guns during investigations after the shooting that sparked the protests.
The St Louis Post-Dispatch reported the 18-year-old was killed after two officers who were serving a search warrant opened fire when he pointed a gun at them.
The paper reported the two officers who opened fire were white, and the man killed was black.