LIVERMORE (CBS SF) — Westbound lanes of Interstate 580 at the Interstate 205 junction were blocked by an overturned 53-foot tractor trailer on Monday night, according to the California Highway Patrol.

The incident was reported shortly after 10 p.m., Monday night. A Sigalert was issued around 10:33 p.m. saying that all westbound lanes were blocked on I-580, forcing the closure of the I-205 interchange.

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When officers arrived, a passenger was trapped inside the truck trying to kick out the window, according to the CHP.

The tractor trailer leaked about 20 gallons of fuel onto the roadway. Fire crews were assisting with the cleanup.

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There was no estimated time for reopening.

It is not clear what caused the accident, or if wind was a factor.

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The Sigalert was updated at 12:39 a.m. on Tuesday, saying the flyover was open, but the bypass remained closed.