Students at the southern California university of Belton are demonstrating against the police killings of Alton Sterling and Philando Castile.
“We are not afraid,” one student wrote on the school’s Facebook page, in reference to the shooting.
“We will not allow violence to break out in our campus.”
Students and alumni have called for calm and peaceful protests in the aftermath of the police shootings of Castile and Sterling.
A protest organized by the school on Thursday began peacefully but quickly turned violent.
Demonstrators threw rocks, bottles and other objects at police, who used pepper spray to subdue protesters.
Police fired tear gas and pepper spray, and used pepper balls and stun grenades to disperse the crowd.
About 10 minutes into the protest, a man who identified himself as a Belton police officer was killed.
Police have not released the name of the officer.
Several other officers suffered minor injuries during the riot.
The violence prompted the Belton City Council to issue a curfew on campus.
Police were seen removing rocks and other debris from the campus, including several bottles and rocks, as well as a rock-throwing student who later died.
Students in Belton were also reportedly using their cell phones to video the police brutality.
Authorities also arrested a man in Belmont for attempting to use his cell phone to record police in the attack.
Police did not immediately respond to ABC News’ request for comment.