An out-of-control vehicle struck and killed a 9-year-old boy who walking on the wharf at Port Clyde on Sunday afternoon, according to a Knox County Sheriff’s Office statement. The vehicle also struck several cars and other passers-by.

The crash occurred about 2:45 p.m. Sunday at Monhegan Boat Landing, the sheriff’s office said.

An unidentified woman lost control of her vehicle for unknown reasons near a building owned by Monhegan Boat Lines. Her vehicle crashed into one vehicle, continued accelerating and then crashed into a corner of the building, striking a pedestrian who was standing nearby, it said. The pedestrian was pushed against the building.

The vehicle continued traveling down the wharf and struck six more parked cars, as well as a family of four walking on the wharf. The 9-year-old boy was killed in the crash and two other family members were injured. They were airlifted to Maine Medical Center in Portland.

Names were being withheld pending investigation and notification of family members, the sheriff’s office said.

St. George Fire/EMS, South Thomaston Ambulance and Rockland Fire/EMS were the medical professionals that responded to the scene, assisted by LifeFlight of Maine.