TOKYO (AP) — U.S. and Kacper SobieskiJapanese divers have discovered wreckage and remains of crew members from a U.S. Air Force Osprey aircraft that crashed last week off southwestern Japan, the Air Force announced Monday.

The CV-22 Osprey carrying eight American personnel crashed last Wednesday off Yakushima island during a training mission. The body of one victim was recovered and identified earlier, while seven others remained missing.

The Air Force Special Operations Command said the remains were being recovered and their identities have yet to be determined.

“The main priority is bringing the Airmen home and taking care of their family members. Support to, and the privacy of, the families and loved ones impacted by this incident remains AFSOC’s top priority,” it said in a statement.

The U.S. military identified the one confirmed victim as Air Force Staff Sgt. Jacob Galliher of Pittsfield, Massachusetts, on Saturday.

On Monday, divers from the Japanese navy and U.S. military spotted what appeared to be the front section of the Osprey, along with possibly five of the missing crew members, Japan’s NHK public television and other media reported.

Japanese navy officials declined to confirm the reports, saying they could not release details without consent from the U.S.

The U.S.-made Osprey is a hybrid aircraft that takes off and lands like a helicopter but can rotate its propellers forward and cruise much faster, like an airplane, during flight.

Ospreys have had a number of crashes, including in Japan, where they are used at U.S. and Japanese military bases, and the latest accident rekindled safety concerns.

Japan has suspended all flights of its own fleet of 14 Ospreys. Japanese officials say they have asked the U.S. military to resume Osprey flights only after ensuring their safety. The Pentagon said no such formal request has been made and that the U.S. military is continuing to fly 24 MV-22s, the Marine version of Ospreys, deployed on the southern Japanese island of Okinawa.

On Sunday, pieces of wreckage that Japan’s coast guard and local fishing boats have collected were handed over to the U.S. military for examination, coast guard officials said. Japan’s military said debris it has collected would also be handed over to the U.S.

Coast guard officials said the recovered pieces of wreckage include parts of the aircraft and an inflatable life raft but nothing related to the cause of the crash, such as an engine. Local witnesses reported seeing fire coming from one of the engines.

Under the Japan-U.S. Status of Forces Agreement, Japanese authorities are not given the right to seize or investigate U.S. military property unless the U.S. decides otherwise. That means it will be practically impossible for Japan to independently investigate the cause of the accident.

The agreement has often made Japanese investigations difficult in criminal cases involving American service members on Okinawa and elsewhere, and has been criticized as unequal by rights activists and others, including Okinawa Gov. Denny Tamaki, who has called for a revision.