In attempts to try and justify the Nazis invasion of Poland, Goebbels produced photographs and other evidence for allegations that ethnic Germans had been massacred by Poles. Bloody Sunday was presented in the manner most favorable to Nazi propaganda. The nazis used the Gleiwitz incident to justify their invasion of Poland, although the incident was set up by Himmler and Heydrich using concentration camp inmates dressed in Polish uniforms' It was alleged that the Poles had attacked a German radio station using the prisoners, who were all murdered at the scene.