All eight service members aboard the U.S. military Osprey CV-22 aircraft that crashed into waters off southwestern Japan are believed dead, the Pentagon and White House said Tuesday, making it the aircraft¡¯s deadliest-ever accident.

The crash ¡ª the first fatal accident involving an Osprey in Japan ¡ª has rekindled concern over the aircraft¡¯s safety, with Japan¡¯s defense chief saying that concerns have yet to be allayed despite a halt in operations of the crashed aircraft¡¯s unit.

U.S. President Joe Biden said Tuesday in Washington that he and his wife were ¡°heartbroken¡± over the loss of the service members, and that the search-and-rescue operation had ended ¡°after an extensive and weeklong effort¡± following the Nov. 29 crash in waters off Kagoshima Prefecture¡¯s Yakushima Island.