2004 Madrid train bombings
The 2004 Madrid train bombings (also known in Spain as 11M) were nearly simultaneous, coordinated bombings against the Cercanías commuter train system of Madrid, Spain, on the morning of 11 March 2004—three days before Spain's general elections. The explosions killed 193 people and injured around 2,000. The bombings constituted the deadliest terrorist attack carried out in the history of Spain and the deadliest in Europe since 1988. The official investigation by the Spanish judiciary found that the attacks were directed by Al-Qaeda in Iraq, allegedly as a reaction to Spain's involvement in the 2003 US-led invasion of Iraq. Although they had no role in the planning or implementation, the Spanish miners who sold the explosives to the terrorists were also arrested.