The German government was told that civilian aircraft were in danger flying over the war zone in east Ukraine days before flight MH17 was shot down but did not inform airlines.
Murder In The Sky: Malaysia Airlines Flight MH17
International Business Times: German government warned of east Ukraine flight danger days before MH17 was downed

A person walks next to a crucifix partially destroyed by a shrapnel on a road on April 23, 2015 near the site where the bulk of the Malaysian Airlines flight MH17 was shot out of the sky near the village of Grabove in the self-proclaimed Donetsk People's Republic.