Abu Dujana has been speculated to be two people : Jamal Ahmidan " the Chinese " who was arrested after the attacks , or more likely '' ' Youssef Belhadj ' '' , a Moroccan based in Molenbeek , Belgium who in 2008 was found guilty of belonging to a terrorist group and sentenced to 12 years in prison , thought by Spanish authorities to be Abu Dujana . Belhajd , also thought to have been connected to the 2003 Casablanca bombings , was arrested in Belgium on 1 February 2005 and extradited to Spain . Convicted after the Madrid bombings , Belhadj was the leader of a Belgian cell of the Moroccan Islamic Combatant Group ( GICM ) along with Hassan el-Haski
2003 Casablanca bombings
2003 Casablanca bombings
Abu Dujana Al-Afghani