The Land Rover carrying Private Gustavo Pérez left the barracks at twenty to nine in the morning. As it was heading towards the Plaza Sagrado Corazón, the driver had to stop to give way to cars coming from the right. At that moment, three terrorists opened fire on the vehicle with machine-guns from the right-hand side and rear, firing up to nine rounds.
The driver, Private Gustavo Pérez (21), was hit in the back. He managed to climb out of the vehicle, but then collapsed with concussion. Colonel Aurelio Pérez-Zamora, who had multiple injuries, died in the emergency room at Basurto Hospital. Major Julián Ezquerro was killed instantly but his body lay inside the vehicle for another hour until the investigating magistrate ordered its removal.
Infantry Major Julián Ezquerro Serrano was 39 years old and had been born in Pradejón (La Rioja). He was married with four young children and at the time of his death his wife was expecting their fifth, who never got to meet his father.