I was under the impression that the Das Reich division that committed the reprisal in Oradour placed the explosives in the church - there was no known resistance movement in Oradour. There was also no fire-fight, the townsfolk were segregated into men and women/children, the men ushered into barns where they were eventually shot with machine guns and then set on fire, and the church was barricaded and blown up using explosives and grenades. For a source, refer to various publications, such as Robert Hebras' account (survivor of the massacre), and Max Hasting's Das Reich. 
 12.27, March 28, 2006 (UTC)