UPDATE (7:08 a.m.): CHP says all lanes of Southbound 99 are now open following this morning's big rig crash. 

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UPDATE (4:23 a.m.): According to the CHP, two trucks carrying pumpkins collided on the 99. While on the 99, near White Lane, one truck slowed down for an unknown reason, causing the truck behind to collide with it. 

The driver of the truck that ran into the one ahead of it, was pinned in. He was taken to a hospital with major injuries. 

The CHP says lanes could be shut down until 8:30 a.m. at the latest. 

The White Lane off ramp is now closed. 

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This morning, California Highway Patrol are investigating a crash between two semi-trucks on the southbound 99. just north of White Lane. According to dispatch, one semi-truck rear ended another semi-truck. The southbound lanes on the 99 are closed until further noticed. CHP says traffic is backed up to Wilson. 

We have a crew headed to the scene and bring you updates as they become available.