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.

Multiple injuries were reported after a small plane crashed early Wednesday evening near Cross Keys Airport in Gloucester County, officials said. Gloucester County Office of Emergency Management said in a statement that the crash was being treated as a “mass casualty incident” with multiple agencies responding to the airport in Monroe Township.