CRANBERRY TWP- Two drivers died in an apparent wrong-way collision on the Pennsylvania Turnpike this afternoon, according to state police.

Robert Humble, 85, of Cranberry Township was driving a Chevy Cruze apparently traveling east in the westbound lane, state police said. Just before 2 p.m. in Cranberry, his vehicle collided head-on into a Ford Focus driving west in the westbound lane.

Both Humble and the driver of the Focus, 56-year-old Helen O'Halloran of North Ridgeville Ohio, were trapped in their cars, and died at the scene.

“The impact was tremendous,” said Butler County Chief Deputy Coroner John Hanovick. “Both cars had tremendous damage to their driver's sides, and both drivers were entrapped.”

O'Halloran, who had been wearing a seat belt, likely died instantly, Hanovick said.

A passenger in OHalloran's vehicle, her 60-year-old husband James W. O'Halloran, was taken to UPMC Presbyterian Hospital in Pittsburgh. Believed to be asleep at the time of the collision, James O'Halloran currently is in stable condition, according to state police.

Two medical helicopters were landed on the turnpike. But Humble, who was not wearing a seat belt, died within minutes, Hanovick said.

The preliminary cause of death for both victims is believed to be blunt severe injuries to the head and chest. Autopsies are planned for tonight for both people.

State police still are investigating. Authorities have said they do not believe alcohol or drugs played a factor.