After a prolonged illness, Kalashnikov was hospitalized on 17 November 2013, in an Udmurtian medical facility in Izhevsk, the capital of Udmurtia and where he lived. He died 23 December 2013, at age 94 from gastric hemorrhage. In January 2014, a letter that Kalashnikov wrote six months before his death to the leader of the Russian Orthodox Church, Patriarch Kirill, was published by the Russian daily newspaper "Izvestia". In the letter, he stated that he was suffering "spiritual pain" about whether he was responsible for the deaths caused by the weapons he created. Translated from the published letter he states, "I keep having the same unsolved question: if my rifle claimed people's lives, then can it be that I... a Christian and an Orthodox believer, was to blame for their deaths?"