SIDNEY – A semi-tractor-trailer rollover closed the westbound lanes of Interstate 80 east of Sidney early Thursday.

The crash was reported near mile marker 64 at 5:07 a.m., where the semi left the roadway and rolled onto its side off the right shoulder. Initial reports indicated unknown injuries.

Emergency crews from the Cheyenne County Sheriff’s Office, Sidney Volunteer Fire Department and Little Tornado Towing responded to the scene. Authorities temporarily shut down the westbound lanes while crews worked the crash and removed the vehicle.

No additional details have been released, and the cause of the rollover remains under investigation.