Sent_en: 2zh No group has claimed the attack but Spanish sources said the attack was probably carried out by the Basque separatist group, considered as a terrorist group by European Union and United States, ETA.
Sent_yy: 目前尚无组织承认此次袭击，但据西班牙消息人士称，该袭击很可能是巴斯克分离主义组织——ETA实施的。该组织被欧盟和美国视为恐怖组织。