Traffic in the northbound lanes of Pennsylvania Turnpike has been slowed by an accident near the Lehigh Valley Service Plaza.

Turnpike officials report the accident is at milepost 54.5, just a couple of miles south of the Lehigh Valley interchange.

The accident occurred shortly after 6 p.m. Thursday. Officials indicated at least one vehicle is on an embankment off the roadway.

Traffic is moving at reduced speeds.

Anyway driving in that area should be on the alert for emergency crews.

No word yet on the number of vehicles involved or injuries.