File talk:Austrians executing Serbs 1917.JPG

Authentic? Retouched or fake?
Has anyone seen a clean version of this image? Is there any confirmation of its origin? The image has obviously been profoundly manipulated. Whether this is a benign case of enormously heavy-handed "retouching" or whether the image is a composite image with painting on it (i.e. "fake") should be ascertained.