All northbound lanes on Interstate 880 just south of Alvarado Niles in Union City are blocked due to a collision, according to the California Highway Patrol.
A Sig alert has been issued.
The collision was reported at 3:15 p.m. and involves multiple vehicles.
No other information was immediately available.
This post was originally posted at http://www.nbcbayarea.com/news/local/Crash-Blocks-Northbound-880-in-Union-City-CHP-508514361.html.