The Marine Corps boat sank during training in a remote area of ​​Imperial County near Highway 78 and Glamis, about 30 miles north of the Mexican border and more than 150 miles east of San Diego on Wednesday. The official spoke on condition of anonymity because the investigation is still ongoing, the Associated Press reports. The tiltrotor aircraft had five Marines on board and was based at Pendleton Camp with the Marine Aircraft Group 39 and was part of the 3rd Marine Corps Wing based at the Marine Corps Miramar Air Station in San Diego. “We can confirm that an aircraft belonging to the 3rd Marine Wing crashed near Glamis, CA,” 1st Lieutenant Duane Kampa, a Marine spokesman, said in a statement. “Military and civilian responders are on the spot.” The El Centro Naval Aviation Facility, which is about 30 miles from the crash site, says there was no nuclear material on the plane, contrary to initial reports. “We can confirm that a aircraft belonging to the 3d Marine Aircraft Wing wing crashed near Glamis, CA. Military and civilian first aid are on the spot. Contrary to initial reports, there was no nuclear material on board. “More information will be available as soon as we receive it,” officials at the base said on Facebook. Rescuers are also looking for a fifth person on board, according to the dispatchers. “NAFEC has just received reports of an aircraft being shot down in the area of ​​Coachella Canal Road and Highway 78. The facility, the federal fire department and the Imperial County Fire Department are responding,” Naval Air Facility El Centro’s Facebook page said. . “I have no further details at this time as the facts are being verified and the available information will be posted on the base’s Facebook page. Please be patient as the installation team works in this emergency. “ Officials say Osprey was based at the Marine Corps Miramar Air Force Base in San Diego. Ospreys fly from the Marines, Navy and Air Force to transport troops and equipment. It is a tiltrotor aircraft that has a higher final speed and greater range than a helicopter, but can be suspended and landed in a similar manner. Four North Carolina-based Marines were killed in an Osprey crash in March during a NATO exercise in Norway. The Associated Press contributed to this report.