Authorities have not made any arrests, but were investigating whether there was a verbal altercation before a man fell to his death from the Industrial Parkway overpass.
The tree was reported blocking both southbound lanes of the highway just south of Redwood Estates in the Lexington Hills area at 1:53 p.m., the CHP said.
A traffic collision is blocking the two right lanes of southbound Interstate Highway 880 in Oakland, according to the California Highway Patrol.
A Golden Gate Bridge worker was injured in an accident on one of the bridge’s sidewalks Tuesday morning, a bridge district spokeswoman said.
A stretch of California’s coastal highway is closed to traffic indefinitely after a chunk of the road fell into the Pacific Ocean.