The Kursk sank to the bottom of the Barents Sea on August 12−13, 2000. The official Russian inquiry concluded that a torpedo explosion was probably the cause. The Russians admitted that the liquid fuel they had been using in their missiles was known to be unstable in certain conditions. After an initial explosion, the submarine was attempting to surface when a second and much bigger explosion—most likely from the propellant of another warhead—tore a hole in the bow and probably killed most of the crew instantly.
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