EXCLUSIVE: Looters dig up Holocaust victims' graves at Nazi death camp Sobibor in hunt for gold <br />Graves of Holocaust victims at Nazi WWII death camp Sobibór plundered, it is claimed <br />Sobibór museum staff in archaeological dig found mass graves disturbed <br />U.S historian Jan Goss previously claimed graves of Treblinka victims were raided in WWII gold rush <br />Shocking photos show Jewish tombstones in Hebrew used to build a toilet, patio and a cowshed in German occupied Poland
