On the night of 27 November 1980, four friends —Miguel Ángel San Martín Fernández, Carlos Fernández Valcárcel, Joaquín Martínez Simón and José Luis Hernández Hurtado— went to the “Chistera” bar in Logroño, which was frequented by members of the police force. At around 9.40 pm, as they were leaving the establishment, two terrorists from ETA militar remotely detonated a device consisting of explosives and shrapnel hidden in a rented car they had parked close to the bar. The only one of the four to survive the explosion was José Luis Hernández.
Joaquín Martínez Simón (45) with four children, was a textile industrialist from Logroño and owned a corset factory. He was severely injured in the attack, and during the following month in hospital suffered the amputation of both legs. He died on 3 January 1981 in a hospital in Pamplona.