Christopher Brooks, 18, critically injured, transported to hospital, after he is struck by a pickup, that fled the scene, while riding his bicycle at the intersection of Chester Pike and Sellers Avenue in Ridley Park.

An 18-year-old man is in critical condition after being struck by a motorist who fled the scene in Delaware County.

It happened at 10:50 p.m. Monday on Chester Pike at Sellers Avenue in Ridley Park.

Police say 18-year-old Christopher Brooks of Crum Creek Drive in Woodlyn was either riding his bicycle or walking it across an intersection when he was struck by a gray or silver pickup truck.

Brooks was not wearing a helmet and suffered head injuries and a broken leg.

Medics rushed him Crozer Chester Medical Center in critical condition.

Police are now looking for the striking vehicle, possibly a Ford F-150 pickup truck.

Surveillance video from a home security system released by police early Tuesday morning shows the truck's headlights driving past the camera moments before the accident.

Investigators say the truck did sustain front-end damage in the collision. They are working to get more identifying information from a piece of the vehicle's bug deflector that was left at the scene.

They are also checking surveillance video from nearby Taylor Hospital for more clues.