An extended closure of lanes on westbound Interstate 80 is expected Friday afternoon after a big rig crash and oil spill, officials said. 

The California Highway Patrol said two lanes on the westbound I-80 are blocked near Alta due to the crash. Eastbound was also temporarily closed for emergency vehicles to access the crash scene. 

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A big-rig crash on I-80 near Alta forced several lane closures Friday afternoon.

CHP Gold Run

Cal Fire reported multiple semi-truck crashes in the same area with major injuries. 

An estimated time for the lanes to reopen is unknown. The CHP said at about 11:45 a.m. that oil is on the road the closure will be for an extended period. 

Details surrounding what led up to the crash are unknown at this time. 

This is a developing story. Check back for updates.