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SAN DIEGO – A dump truck overturned down an embankment off a San Diego freeway Thursday, trapping one person in its cab and prompting the closure of two off-ramps, authorities said.

The crash happened about 10:20 a.m. on the Morena Boulevard off-ramp from westbound Interstate 8 in Old Town, California Highway Patrol Officer Jesse Matias said in a news release. Video from SkyFOX shows that the truck took out the bridge railing on the lefthand side of the road, ultimately trapping the driver inside the cab.

The driver, who wasn’t publicly identified, was hospitalized with unknown injuries, Matias said.

When it overturned, the truck’s fuel tank spilled into a dry riverbed nearby. As a result, westbound and eastbound off-ramps to Morena were closed to clean up the fuel and investigate the crash.

The off-ramp closure is expected to last at least three hours, according to CHP.

Details about how the crash happened are still under investigation.

Check back for updates on this developing story.