A multi-vehicle crash is causing delays Thursday morning on Interstate 78 in Lehigh County.

The crash was reported about 5 a.m. on I-78 westbound near the Hamilton Boulevard exit in South Whitehall Township, according to 511pa.com, PennDOT’s traffic website. Traffic cameras showed an overturned truck near the exit.

Two of three westbound lanes are closed, and traffic is backed up for several miles leading into the area of the crash. PennDOT estimates the crash will be cleared by noon.

Check back later for updates.