ETA had previously placed car bombs in Madrid , the deadliest being the Plaza República Dominicana bombing in July 1986 , which had killed 12 Civil Guards . The attack came 16 months after the 1992 Madrid attack , when ETA had killed four members of the military and a civilian employee of the army and a year after another car bomb attack targeting the military had left 13 people wounded . It was ETA 's first attack in the capital since 30 December 1992 , when they had killed a retired civil guard
Plaza República Dominicana bombing
Plaza República Dominicana bombing
1993 Madrid bombings