Protests erupted in Northern California early Wednesday after Donald Trump was declared the next president of the United States.

According to KTVU, about 100 protesters gathered in Oakland and sought to block freeways and create a commotion. The protesters forced BART to shut down and at least one demonstrator was struck by a vehicle.

SF Gate reported that police temporarily shut down Highway 24 to tend to the woman who was struck. California Highway Patrol Sgt. Matt Langford described her injuries as “major.”

The station also reported that some cars were set on fire and other vehicles had broken windows.

KTVU added that Trump supporters hosted a watch party at the Twitter headquarters in San Francisco and some protesters were seen in masks.

Protesters were also seen in Berkeley, chanting “not my president.”

Click for more from KTVU.