Five days before the 1986 Basque parliamentary elections, ETA assassinated the military governor of Guipúzcoa, Rafael Garrido Gil. At the time, he was with his wife, Daniela Velasco Domínguez de Vidaurreta, one of their sons, Daniel Garrido Velasco, and a military driver, Norberto Jesús Cebrer Lozano.
At a red light at the junction between the Boulevard and Calle Legazpi, two ETA members who were following on a large motorcycle pulled up beside the official car. One of them attached an explosive device to the roof of the vehicle. The bomb went off a few seconds later and the governor, his wife and son were killed instantly.
The driver suffered traumatic shock, bruising, cuts and second-degree burns. María José Teixeira (27), a Portuguese national who was walking past at the time, was injured in the blast and died 17 days later.
Daniela Velasco was working at a high school in San Sebastian. Her brother, Silverio Velasco, also worked at the same school. When he returned to work a few days after the attack, he reported seeing some of the students laughing and making obscene gestures — particularly those who were members of Jarrai (the youth wing of the separatist movement).