A teenage girl was injured when a truck struck her leg Sunday night at P.E.I.'s Brackley Drive-in Theatre.

The truck was parked in the front row of the movie theatre. A group of teenagers had been lying in the area in front of the vehicle. Theatre staff member Jonathan Waddell says the male driver believed everyone had gotten up and walked away, when he pulled the vehicle forward.

Some people at the Brackley Drive-In watch from their cars, while others sit or lay on the grass. (CBC)

"He didn't see her. He saw the friends get up and he thought everyone got up from in front of the truck. He didn't think there was still someone half asleep in front of the truck," said Waddell.

"He was completely in shock. He waited around to make sure she was OK. He was the last one to leave because he wanted to make sure everything was taken care of before he left."

Waddell said as far as he knows the 15-year-old didn't have a broken leg, just welts and bruises. She was taken to the hospital by Island EMS, but Waddell hasn't heard back from the family since. The family is asking their daughter's name not be released.

RCMP officers spoke to the driver, who Waddell believes is a tourist. Waddell is not sure if any charges were laid.

The drive-in's owners are now exploring ways to stop vehicles in the front row from driving forward, such as putting in curb-like barriers.