BERKELEY, Calif. — Hundreds of people marched through Berkeley for a third night a row, blocking a major highway and stopping a train as activists in this ultra-liberal bastion protested grand jury decisions not to indict white police officers in the deaths of two unarmed black men on the other side of the country.

Protesters blocked traffic on both sides of Interstate 80 in Berkeley, while another group stood and sat on train tracks, temporarily forcing an Amtrak train to stop Monday night.

The California Highway Patrol said a large group of demonstrators destroyed highway perimeter fencing, flooded lanes and threw rocks and other objects at officers. It took about an hour and a half to clear the interstate, and no major injuries were reported.

The agency arrested 150 people on suspicion of resisting arrest, obstructing police and other charges.

The Berkeley Police Department arrested an additional nine people, including a juvenile, Officer Jennifer Coats said early Tuesday. She described the latest protests as mostly peaceful, with no injuries and no reports of looting or damaged property. Police estimated the crowd at about 1,500 people.

The protesters began peacefully marching Monday through downtown Berkeley. The first stop for demonstrators shouting, “Who do you protect? Peaceful protest” was the Police Department, where a line of officers in riot gear blocked them from getting close to the building. The group then headed to a Bay Area Rapid Transit train station and sat outside, prompting authorities to shut down the station briefly.

Although many activists in other parts of the country have gone home, protests in Berkeley and Oakland are still active, reflecting the area’s long history of protest dating to the 1960s.