At least four officers with the St. Louis Police Department in Missouri were struck by gunfire on Monday night, said the department.
“We have had 4 officers struck by gunfire tonight. All have been transported to an area hospital. All are conscious and breathing. Their injuries are believed to be non-life threatening. Officers are still taking gunfire downtown," said the police department on Twitter.
Protests took place in multiple cities across the state this week. In Kansas City, protests prompted the mayor to enact a curfew and request assistance from the Missouri National Guard.
In Ferguson -- where protests against police brutality and racism broke out in 2014 after black teenager Michael Brown was shot and killed by a white police officer -- the police department building was damaged and evacuated on Sunday.