A U.S. military Osprey aircraft crashed into the ocean Wednesday near the small southern Japanese island of Yakushima with six people on board, killing at least one crew member, Japan's coast guard said. The U.S. military in Japan offered no immediate comment on the incident, but an official with the Japan Coast Guard confirmed to CBS News that one crew member was recovered dead and search operations were continuing into the night for the other five people from the Osprey.

Coast guard spokesperson Kazuo Ogawa was quoted earlier by the AFP news agency as saying an emergency call came in from a fishing boat to report the crash. He said there were eight people on the Osprey, but the coast guard later revised that figure to six.

Japan Coast Guard conducts search and rescue operation at the site where a U.S. military aircraft MV-22 Osprey crashed into the sea off Yakushima Island, Japan

Japanese national broadcaster NHK aired video from a helicopter showing a coast guard vessel at the site with one bright orange inflatable life raft seen on the water, but nobody in it.

NHK said an eyewitness reported seeing the aircraft's left engine on fire before it went down about 600 miles southwest of Tokyo, off the east coast of Yakushima.

The Kagoshima regional government said later that the Osprey had been flying alongside another aircraft of the same type, which landed safely on Yakushima island.

An image from video released by the Japan Coast Guard shows a helicopter lowering a rescuer into the water and a vessel involved in the search and rescue mission after a U.S. military Osprey aircraft crashed into the sea near the southwest Japanese island of Yakushima, Nov. 29, 2023. Japan Coast Guard handout via Reuters

Japan's Kyodo News cited coast guard officials as saying the first emergency call came in around 2:45 p.m. local time (12:45 a.m. Eastern), and it said the Japanese Defence Ministry reported the Osprey dropping off radar screens about five minutes before that.

An Osprey can take off and land vertically like a helicopter but then change the angle of its twin rotors to fly as a turbo prop plane once airborne.

The Japanese government approved last year a new $8.6 billion, five-year host-nation support budget to cover the cost of hosting American troops in the country, reflecting a growing emphasis on integration between the two countries' forces and a focus on joint response and deterrence amid rising threats from China, North Korea and Russia.

The Osprey involved in the crash was assigned to Yokota Air Force Base outside Tokyo, NHK reported, but it said the aircraft had departed Wednesday from the smaller U.S. air station Iwakuni to fly to Kadena Air Base on Okinawa, which is in the same island chain as the tiny island of Yakushima. The small island sits just south of Kagushima prefecture, on Japan's main southern island of Kyushu.

There have been a spate of fatal U.S. Osprey crashes in recent years, most recently an aircraft that went down during a multinational training exercise on an Australian island in August, killing three U.S. Marines and leaving eight others hospitalized. All five U.S. Marines on board another Osprey died the previous summer when the aircraft crashed in the California desert.

An Osprey crashed in shallow water just off the Japanese island of Okinawa in 2016, but all the U.S. Marines on board survived that incident.