The 2004 Madrid train bombings were a series of coordinated terrorist attacks that occurred on March 11, 2004, in Madrid, Spain. Ten bombs were detonated on four commuter trains during the morning rush hour, killing 191 people and injuring over 2,000 others. The attacks were carried out by Islamist extremists and were the deadliest in Spain's history. In the aftermath, the Spanish government faced criticism for its handling of the situation. The attacks influenced the 2004 Spanish general election, leading to a change in government. The bombings highlighted the threat of terrorism in Europe and prompted increased security measures across the continent.