The controversy surrounding Adolf Hitler's skull fragments is a little embarrassing for the Russian secret services. In 2000 they presented a skull fragment and a piece of jawbone that they claimed were the remains of the Nazi leader. It was an attempt to quash ... rumors that he had escaped alive at the end of World War II. But in October US researchers presented the results of DNA tests on the skull and said it definitely didn't belong to the dictator. "The bone ... corresponds to a woman between the ages of 20 and 40," said Nick Bellantoni of the University of Connecticut. Russia's FSB intelligence service, the successor to the KGB, has now rejected the doubts. The bones are definitely Hitler's, Vasily Khristoforov, the director of the FSB archives, told the newspaper Izvestiya. Moscow is the only place with the mortal remains of Hitler, Khristoforov said. However, Bellantoni said he was allowed to work on the skull for an hour. When he flew home from Moscow he had two samples in his luggage: a sample from the skull fragment and one sample of blood from the sofa on which Hitler is said to have shot himself. Bellantoni was able to compare the bloodstains on the blood-stained fabric with photos the Soviets took after they seized Hitler's bunker in Berlin. The stains had matched those in the photos. The research showed that the sofa blood DNA did not match the skull DNA. The sofa blood was male and the skull belonged to a woman.