A Saturday morning crash in Joppa has snarled traffic along Interstate 95.

At just before noon, a crash was reported along northbound I-95.

All northbound lanes were temporarily closed, but one lane has since reopened.  Injuries were reported in the crash.

The Joppa-Magnolia Volunteer Fire Company has units on the scene.

The Maryland Transportation Authority says there is now a 4-mile backup along northbound I-95.

Motorists should use an alternate route.