An 81-year-old man who served as a guard at Nazi concentration camps during World War II has lost his appeal, clearing the way for his deportation, according to a media report. The 7th US Circuit Court of Appeals ruled Thursday that Josias Kumpf, who came to the United States in 1956, broke the law when he did not disclose his work at the camps, the Milwaukee Journal-Sentinel reported. The court upheld a ruling by US District Judge Lynn Adelman, who said Kumpf's US citizenship should be revoked because he violated a 1953 law that says people who have persecuted others are not allowed to enter the country. Kumpf, a Yugoslavian-born ethnic German, admitted after a federal civil action was filed in 2003 seeking to revoke his citizenship that he had stood guard at the perimeter of the Trawniki Training Camp in Nazi-occupied Poland, and the Sachsenhausen Concentration Camp near Berlin. He contended he was forced into the SS and feared he would be killed if he left. He also said he never hurt or killed anyone.