The
2004 Madrid train bombings (also known in Spain as
11-M) 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 191 people and injured more than 1,800. The official investigation by the
Spanish judiciary found that the attacks were directed by an
al-Qaeda-inspired
terrorist cell, although no direct al-Qaeda participation has been established. Though they had no role in the planning or implementation, the Spanish miners who sold the explosives to the terrorists were also arrested.