The 1987 Hipercor bombing was a car bomb attack by the Basque separatist organisation ETA which occurred on 19 June 1987 at the Hipercor shopping centre on Avinguda Meridiana, Barcelona, Spain. The bombing killed 21 people and injured 45. This represents the deadliest attack in ETA's history. Controversy surrounded the timing of telephone warnings made before the attack and the authorities' response to them.