In May 1945, when the Prague uprising broke out, Günther, travelling with a heavily armed motorcade, was stopped at a roadblock near Beroun by Czech partisans. He was arrested and disarmed. According to the partisans, he attempted to grab a weapon from a guard and was mortally wounded in the ensuing struggle when he was injured by a hand-grenade; he later died from his injuries. The Czech authorities later accepted this account of his death, which was given to the German judicial authorities.