Wagner mercenary chief Yevgeny Prigozhin’s doomed private plane showed no signs of distress until a sudden drop 30 seconds before the deadly crash in Russia — amid speculation that the rogue warlord’s plane may have been downed by a bomb hidden in a crate of wine.

The Embraer Legacy 600 executive jet, with Prigozhin and other senior Wagner Group members listed among the 10 passengers, showed “no indication that there was anything wrong” earlier in the flight Wednesday, according to Ian Petchenik of the flight-tracking site Flightradar24.