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 plane went down Wednesday afternoon in Monroe Township in Gloucester County near the Cross Keys Aiport., officials said. The Gloucester County Office of Emergency Management confirmed the downed plane in a Facebook post but did not have many details about the incident but asked people to avoid the area.

The call for the “mass casualty” incident came in around 5:30 p.m. for an emergency situation at the Cross Keys Airport in Gloucester County, just over 20 miles outside of Philadelphia.