2 trapped after 4-vehicle crash in Fremont

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A box truck crashed into a center divider and collided with three other vehicles Monday afternoon on southbound Interstate Highway 680 in Fremont, California Highway Patrol officials said. 

The crash was reported at 12:04 p.m. on Highway 680 just north of Mission Boulevard.

CHP officials said two people were trapped.

A Sig-alert was issued at 12:18 p.m. because the high-occupancy vehicle lanes and two other lanes were blocked, but only the high-occupancy lanes are still closed as of shortly after 1 p.m.

At least two vehicles sustained major damage. The collision involved the box truck, a red Toyota pickup truck, a gray Kia and an SUV.

CHP officials don't know when the HOV lanes will reopen. 

Stay with KTVU.com for updates on this developing story.