Three Anne Arundel County teens traveling the wrong way toward oncoming traffic were killed early Saturday in a head-on collision that also killed the second driver on state Route 50 near Davidsonville Road, Maryland State Police said.

Breanna Marie Franco, 18, Brittany Ann Walker, 19, and Zachary Tyler Rose, 18, were in a vehicle traveling west in an eastbound lane of Route 50 that struck a second vehicle head on before 3:30 a.m., troopers said. The vehicle operated by the teens briefly caught fire.

The teens were pronounced dead at the scene, police said.

The fourth victim, whose name is being withheld until family is notified, died while being transported to a local hospital, troopers said.

Police do not know if alcohol or speed were factors in the crash. An investigation is continuing.

It is also unknown how the vehicle came to be traveling the opposite direction on the roadway, police said. Both Anne Arundel County and the Maryland State Police fielded several calls prior to the collision that reported a vehicle traveling in the wrong lanes on Interstate 97 and on Route 50.

Whether the reports are related to the vehicle involved in the collision is not known, according to troopers.

The accident shut down eastbound traffic on Route 50 for about four hours.

ywenger@baltsun.com