KNYAZE-VOLKONSKOYE, Russia, Jan. 31 (UPI) -- Three Russian servicemen were killed in a munitions explosion in a combat vehicle during a training operation in the Khabarovsk Region, military officials said.
The armored vehicle was participating in a live-fire exercise Thursday in Knyaze-Volkonskoye, RIA Novosti reported.
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"As a result of the blast, three troops, including an officer, were killed," a Defense Ministry spokesman said.
Investigators were trying to determine what caused the explosion.