A ll 15 people who were on a skydiving aircraft were being treated for injuries after the small plane crashed at Cross Keys Airport in Williamstown, New Jersey, on Wednesday, according to a hospital spokesperson.

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!"

A skydiving plane with 15 people aboard went off the end of a runway in southern New Jersey on Wednesday evening, federal authorities said. A number of casualties have been reported.