GOLD RUN – An overturned big rig had eastbound Interstate 80 traffic blocked in the Sierra Nevada Thursday morning.

The crash happened a little after 4:30 a.m. just west of the Gold Run offramp.

Exactly what led up to the crash is unclear, but a FedEx truck was involved.

No injuries have been reported, but traffic was backing up for over a mile leading up to Gold Run.

California Highway Patrol announced a little after 8:30 a.m. that I-80 had reopened.

Chain controls due to snow remain in effect throughout the Sierra as of Thursday morning. Along eastbound I-80, controls are from Drum Forebay to Boca. Westbound I-80 has controls from Truckee to Drum Forebay.