Several people were injured when a big rig jack-knifed on the eastbound 10 Freeway in Upland near the Ontario border Wednesday morning, officials said.
The multi-vehicle crash happened just after 7:30 a.m. near the Mountain Avenue exit, according to the California Highway Patrol.
At least 8 cars were involved in the crash and remained scattered around the big rig at 8 a.m.
The HOV, numbers 1, 2 and 3 lanes in the eastbound direction of the freeway were closed where the crash occurred.
Traffic was snarled for miles in the eastbound lanes. Drivers were diverted to the number 4 lane of the freeway as crews worked to remove the vehicles from the scene.
It was unknown how many people were injured and the severity of their injuries.
It was unknown when the lanes would reopen.
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