According to the ministry, the search-and-rescue operation involves Tu-142, An-12, An-30 aircraft, Mi-8 helicopters. Another six vessels of the Russian Pacific Fleet were deployed to the search area.
"Pilot's body was found in the area of the search-and-rescue operation. The body of the deceased pilot was taken aboard a vessel involved in the operation in the area," the ministry said in a statement.
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Both crews (of two pilots each) ejected, but only one pilot has been rescued so far, while the first body was found earlier in the day floating in an individual life-support raft.
"A vessel involved in the search-and-rescue operation found and lifted on board an individual life-support raft with the body of a Su-34 pilot," the ministry said in a statement. Another six ships and vessels of the Russian Pacific Fleet were deployed to the search area.
The Russian Defense Ministry has launched an investigation into the incident.