Police escort a suspected member of al Qaeda as they arrive at the federal supreme court in Karlsruhe April 30, 2011. German police arrested three members on Friday, averting "a concrete and imminent danger" of a terrorist operation, authorities said. The newspaper Bild quoted security sources as saying the three, all young Moroccans, were arrested in Duesseldorf and Bochum. It said police seized large amounts of explosives. REUTERS/Alex Domanski (GERMANY - Tags: CRIME LAW)