LOS ANGELES - Following a multi-vehicle crash, a SigAlert has been issued on the 10 Freeway in downtown Los Angeles ahead of the morning rush hour.

What we know:

A SigAlert was issued from the westbound side of the 10 Freeway to the 110 Freeway on Thursday morning.

Officials with the California Highway Patrol said just before 3 a.m., a gray Tesla SUV collided with a Caltrans vehicle, which caused barrels of sand to spill onto the freeway lanes.

Officers shut down the entire connector from the 10 Freeway to the 110 Freeway.

Crews brought in tow trucks and sweepers to help get the debris off the road.

Caltrans and CHP officers are working to reopen the roads as quickly as possible, and the SigAlert is expected to last through at least 8 a.m.

What we don't know:

The cause of the cra

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