 According to Spanish police, the decision to break the truce may have come from a more violent side of ETA, opposed to any negotiations with the Spanish government, formed by members who joined ETA after participating in the kale borroka and led by Txeroki, who was in charge of all of the organisation's commandos since 2004.Madrid has been one of the most targeted cities by ETA.Prior to the attack, 36 car bombs had gone off in the city in the previous 20 years and at least 119 people had been killed in attacks carried out by the armed organisation.