Two crew members who were missing following the crash of a fighter jet in mountainous terrain in Washington during a routine training flight have been declared dead, the Navy said Sunday.

The EA-18G Growler jet from the Electronic Attack Squadron crashed east of Mount Rainier on Tuesday afternoon, according to Naval Air Station Whidbey Island. Search teams, including a U.S. Navy MH-60S helicopter, launched from the air station to try to find the crew and crash site.

Army Special Forces soldiers trained in mountaineering, high-angle rescue and technical communications were brought in to reach the wreckage, which was located Wednesday by an aerial crew resting at about 6,000 feet in a remote, steep and heavily wooded area east of Mount Rainier, officials said.

The aviators’ names won’t be released until a day after their next of kin have been notified, the Navy said in a statement Sunday, adding that 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 Associated Press