ANTIOCH, Calif. (KRON) — The eastbound State Route 4 on-ramp is closed from Contra Loma Boulevard after a traffic crash on Tuesday afternoon, Antioch police said.

Drivers are asked to avoid the area of Contra Loma Boulevard between Buchanan Road and State Route 4. The crash happened at 2:30 p.m. and at least one person has major injuries, according to California Highway Patrol.

This is a developing story. We will update this article with more news as it comes in.