BERKELEY, CA (AP) — Hundreds of protesters are blocking a major highway and train tracks in the latest demonstration in Northern California against grand jury decisions not to indict white police officers in the deaths of two unarmed black men.

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

A large group of people began peacefully marching earlier Monday through downtown Berkeley. The first stop for demonstrators shouting, "Who do you protect? Peaceful protest" was the Berkeley Police Department. 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 briefly shut down the station. But as the night went on, the protesters divided into smaller groups that disrupted traffic and train passengers.