KYIV, Ukraine (AP) — The former prisoners of war still puzzle over the strange events leading up to the night now seared into their memories, when an explosion ripped through the Russian-controlled Olenivka prison barracks and killed so many comrades two years ago.

Among the survivors: Kyrylo Masalitin, whose months in captivity and long beard age him beyond his 30 years. Arsen Dmytryk, the informal commander of the group of POWs that was shifted without explanation to a room newly stocked with bare bunks. And Mykyta Shastun, who recalled guards laughing as the building burned, acting not at all like men under enemy attack.

“Before my eyes, there were guys who were dying, who were being revived, but it was all in vain,” said Masalitin, who is back on the front line and treated as a father-figure by the men he commands.