A Moroccan citizen and the third alleged "intellectual author" of the train bombings. El Haski faces charges of membership of a terrorist organisation, the murder of 191 people, the attampted murder of 1824, and criminal damage. The total sentence demanded by the prosecution is 38654 years.
Hassan El Haski is accused of being a leader of the Moroccan Islamic Combat Group, an organisation also held to be responsible for bomb attacks in Casablanca in 2003. He is said by a witness to have left Spain a few days before the train bombings, although he later returned and was eventually arrested in Lanzarote in December 2004.