Each morning, a Civil Guard convoy consisting of a coach, a minibus and an off-road vehicle took seventy officers, aged between 18 and 25, from the Traffic School on Calle Príncipe de Vergara to the motorcycle practice ground in Venta de la Rubia, on the outskirts of Madrid. On the morning of 14 June 1986, ETA terrorists planted a van containing 35 kilograms of explosives and various kilograms of shrapnel in Plaza de la República Dominicana. They detonated the explosives as the Civil Guard convoy was passing Number 7. Twelve civil guards were killed and a further 78 people (including officers and passers-by) were injured by the huge blast.
Santiago Iglesias Godino was born in Hondón de las Nieves (Alicante), but grew up in Linares (Jaén), where a street has since been named after him. He was an organ donor and for this reason his body was not present at the official funeral, held at the General Directorate of the Civil Guard the day after the attack.