SAN PABLO, Calif. (KRON) — A fatal collision occurred on eastbound Interstate 80 in San Pablo early Saturday morning.

Initial reports of the crash were reported around 5 a.m. A Sig alert was issued shortly before 5:30 a.m. All eastbound lanes are currently back open after being blocked for several hours.

(Photo courtesy of Caltrans)

Multiple cars may have been possibly involved and there is a fatality, CHP told KRON4. A coroner is currently in route to the scene of the crash.

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All eastbound lanes are back open. A traffic backup occurred for several hours. Drivers were advised to use San Pablo Dam Road as an alternate route.

This is a developing story. Stick with KRON4 for updates.