German airlines ' warned of risk of flying over land ' , it is claimed . Diplomatic flights refer to Ukrainian air force plane shot down on July 15 . Malaysia ##tic 's flight MH17 was shot down on July 15 last year .
German government 'knew of risk of flying over Ukraine ' , it is claimed . Diplomatic cables refer to Ukrainian air force plane shot down on July 14 . Malaysia Airlines 's flight MH17 was shot down on July 17 last year .