Madrid airline office attacks

On 1 July 1985, in an attack that had targeted the American Trans World Airlines offices in Madrid, Spain, the British Airways offices in the floor below were bombed, killing a woman and wounding 27 people, most of them Spanish. The bombing was followed up minutes later when gunmen opened fire with submachine guns on the Alia Royal Jordanian Airline offices some hundred yards away, injuring two people by shattered glass.

Source: Wikipedia — Madrid airline office attacks (CC BY-SA 4.0)