Eight people were rescued and three remained missing after a U.S. Navy plane crashed into the western Pacific Ocean on Wednesday, the Navy said.

The C-2 “Greyhound” transport aircraft came down about 500 nautical miles (925 kilometers) southeast of Okinawa as it was bringing passengers and cargo from Japan to the USS Ronald Reagan aircraft carrier, the Navy said in a statement.

The Reagan was operating in the Philippine Sea during a joint exercise with Japan’s Maritime Self-Defense Force when the twin-propeller plane crashed at 2:45 p.m. Japan time. The cause of the crash was not immediately clear and the incident will be investigated, the Navy said.

Eight people were rescued about 40 minutes later. They were taken to the Reagan for medical evaluation and are in good condition, the Navy said.... Read More: