Abdelilah Hriz – arrested in his native Morocco on January 2008 by Moroccan police . In Rabat , Hriz was found guilty and sentenced up to 20 years in prison on December 2008 . On 29 April 2011 , the German Federal Police arrested 3 Moroccans in the western German city of Düsseldorf and one in nearby Bochum . The Moroccans were linked with the 2004 Madrid train bombings and 2005 London transit attacks . The arrests were based on suspicion they were planning a terror attack in the country , they said . Local media reports that officers had seized large amounts of explosives when the three were arrested . The three alleged terrorists were brought to a judge the next day and they are to remain in detention pending an awaiting trial
2004 Madrid train bombings
2004 Madrid train bombings
2004 Madrid train bombings suspects