Watch: Black Lives Matter Protesters Shut Down San Francisco-Oakland Bay Bridge

Black Lives Matter protesters blocked all westbound lanes of Interstate 80 on the San Francisco-Oakland Bay Bridge Sunday evening. They also tried to paint BLM with yellow paint on the bridge before police officers intervened. The protesters reportedly arrived at the bridge in a caravan of about 50 vehicles, according to CBS San Francisco. California Highway Patrol officers first arrived at the scene before San Francisco police arrived.

The car caravan arrived at about 4:30 p.m. local time, and there was a stand-off with police that lasted over two hours. Traffic was backed up for six miles past Emeryville, reports ABC7. The CHP closed the Fremont Steet, Harrison Street and Fifth Street off-ramps to keep protests from getting back to the bridge. There were also several arrests, but the CHP has not released a number yet.

During the backup, drivers got out of their cars to share photos of the scene on social media. Some showed their support for the protesters but were still angry about being stuck in traffic for hours. "Protesters have painted #BLM on the bay bridge and this is the least angry I've been while parked at a standstill on the bay bridge for an actual hour," Twitter user Amy Foot wrote.