F ourteen of the 15 people on board a skydiving aircraft are being treated for injuries after the small plane crashed at Cross Keys Airport in Williamstown, New Jersey, on Wednesday, Andrew Halter, of the Gloucester County Office of Emergency Management, said.

A skydiving plane with 15 people onboard went off the end of the runway at a New Jersey airport, southeast of Philadelphia, Wednesday evening, according to the Federal Aviation Administration.

A downed aircraft near Cross Keys Airport in Williamstown, New Jersey, has prompted a "mass casualty incident," Gloucester County Emergency Management said Wednesday. The officials added, "Please avoid the area to allow emergency vehicles the best access!"