The cause of the crash is unknown, said officials with NATO’s International Security Assistance Force.
Officials said the aircraft was carrying U.S. troops when it crashed seven miles west of Qalat City in Zabul province. The injured were transported to a nearby base for medical treatment.
The CV-22, a modified version of the Marine Corps MV-22, conducts long-range infiltration and resupply for U.S. forces. It employs tilt-rotor technology that allows it to takeoff and land as a helicopter, and fly like a fixed-wing aircraft.
(From an International Security Assistance Force news release.) Source: USAF