State police believe a heart attack caused a man to lose control of his pickup truck Friday afternoon and crash into two trees in Parker Township, injuring him and a 14-year-old girl.

Ronald L. Dunkle, 51, the driver, and the girl, his passenger, were briefly trapped before being rescued following the wreck around 4:35 p.m. on Route 268, authorities said.

Dunkle was taken to UPMC Presbyterian and the girl was taken to UPMC Children's Hospital. Emergency crews described their injuries as serious. Their conditions were not available Monday.

Police said Dunkle was driving east on Route 268 in a 2001 Dodge Dakota, just west of Surface Mine Road, when he apparently suffered the medical emergency while traveling a curve. The truck went off the right side of the road and hit two trees.

One of the trees was uprooted, according to a police report, and the pickup ran over it.

Rescuers used hydraulic tools to cut off both doors and the roof to extricate Dunkle and the girl, who is believed to be a relative of the driver, said Chief Eric Feicht, of the Bruin Volunteer Fire Department. It took less than 15 minutes to get them out.

Both front air bags deployed. Neither occupant was believed to be wearing a seat belt, authorities said. Both were taken by ambulance to nearby Parker City Municipal Park in Armstrong County, where STAT MedEvac helicopters landed before flying them to the Pittsburgh hospitals.

The crash closed the road for about 45 minutes. Assisting police and the Bruin VFD were Parker Township and Chicora volunteer firefighters and the Emlenton Area Ambulance Service and Karns City Regional Ambulance.