Weimar, Germany – An Iranian delegation upset its German hosts by refusing to tour a concentration-camp memorial, the city council of Weimar in eastern Germany said Thursday.The Buchenwald concentration camp, where Nazis killed tens of thousands of political prisoners and people from minorities through disease, exhausting work and executions, is located near the city. Visitors usually pay their respects to the dead at the memorial and visit the museum. But the group from Shiraz, Iran – which is twinned with Weimar – refused to make the scheduled trip on Wednesday, civic officials said. Mayor Stefan Wolf deplored the decision, saying it was inconceivable that a friend would try to ignore the pain caused by the Nazi camp. Local newspapers said the city council refused to meet the Shiraz delegation because of the canceled visit.