The Navy said search and rescue efforts have shifted into a long-term salvage and recovery operation as the cause of the crash is still being investigated.

The jet – an EA-18G Growler aircraft – was carrying two crew members when it went down during a routine training flight.

“The U.S. Navy has declared two missing crew members of the EA-186 Growler crash, deceased,” the announcement reads. “Electronic Attack Wing Pacific has shifted from search and rescue efforts to recovery operations.”