A undated photo obtained on September 18, 2018 shows a Russian IL-20M (Ilyushin 20m) aircraft landing at an unknown location. Russia blamed Israel on September 18, 2018 for the loss of a military IL-20M jet to Syrian fire, which killed all 15 servicemen on board, and threatened a response. / AFP / Alexander KOPITAR
An Il-20 aircraft similar to the plane shot down. AFP

Vladimir Putin blames downing of Russian plane in Syria on 'chance events'