Riots, looting and violence broke out for a second night in a row on Sunday during protests in Berkeley, California over recent police killings of unarmed black men.

Although a peaceful protest began Sunday night at the University of California, Berkeley campus, it ended in chaos after protesters moved into Oakland and a group of people began vandalizing police cars and stores. They also briefly shut down Highway 24.

It was the second consecutive night that violence erupted during protests over the fact that neither police officer was indicted in the chokehold death of Eric Garner in New York or the shooting of Michael Brown in Ferguson, Missouri.

While a group of 300 to 400 protesters moved into downtown Berkeley, some damaged patrol cars and stores. Police said groups of protesters also threw trash cans into streets, lit garbage on fire, smashed building windows and looted businesses. There also were reports of vandalism at Berkeley City Hall, while demonstrators managed to temporarily shut down the downtown Berkeley BART station, reports USA Today.

However, some protesters stepped in to stop the vandalism by shouting at the violent groups and locking arms to keep looters out.

The California Highway Patrol said officers fired tear gas into a crowd of protesters after they allegedly threw rocks, bottles and explosives at them and tried to set a patrol car on fire.

According to Berkeley police spokeswoman Officer Jennifer Coats, five people were arrested Sunday night during the demonstrations, reports the Associated Press. In addition, two officers sustained minor injuries, while one protester was hospitalized for non-life threatening injuries after he attempted to prevent people from looting a downtown electronics store and was subsequently hit with a hammer.

Coats added that another person was arrested for throwing a heavy object, which injured an officer on Saturday. Another was brought into custody for using a skateboard to break windows and damage a grocery store.