State police said a wrong-way driver on I-83 in Shrewsbury Township apparently suffered a medical episode. Read the full update here.

Updated at 10:09 p.m.:

Emergency crews have cleared the crash on Interstate 83 in the area of the Shrewsbury exit and the highway has reopened to traffic.

Previously reported:

A head-on collision has closed Interstate 83 southbound near the Shrewsbury exit.

Emergency crews were dispatched to the crash with entrapment at 8:38 p.m., according to York County 911.

Initial reports indicate the crash is just south of Exit 4, the Shrewsbury exit.

Both southbound lanes are blocked and traffic in the area is backing up.

Check back later for additional details.