July 3 (UPI) -- 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. The Federal Aviation Administration said in a statement that the Cessna 208B aircraft was departing Cross Keys Airport in Williamstown, located 52 miles southeast of Trenton, at 5:30 p.m. EDT when the incident happened. Gloucester County Emergency Management reported it as a "multi-agency MASS