The Madrid Train Bombings occurred on March 11, 2004, when a series of coordinated explosions targeted commuter trains in Madrid, Spain. The attacks took place during the morning rush hour, killing 191 people and injuring over 2,000 others. The bombings were attributed to Islamist militants linked to Al-Qaeda, although the initial investigation faced political controversy. The incident marked one of the deadliest terrorist attacks in Europe and led to increased security measures in Spain and across the continent.