text: Economic targets: a wide array of private or public property considered valuable assets of Spain, especially railroads, tourist sites, industries, or malls.
  Exceptionally, ETA also assassinated former ETA members such as María Dolores Katarain as a reprisal for having left the group.
  A number of ETA attacks by car bomb caused random civilian casualties, like ETA's bloodiest attack, the bombing in 1987 of the subterranean parking lot of the Hipercor supermarket in Barcelona which killed 21 civilians and left 45 seriously wounded, of whom 20 were left disabled; also the attack of Plaza de Callao in Madrid.
  Tactics
  ETA's tactics included:
  Direct attacks: killing by shooting the victim in the nape.
  Bombings (often with car bombs). When the bombs targeted individuals for assassination they were often surreptitiously rigged in the victim's car. The detonating systems varied. They were rarely manually ignited but instead, for example, wired so the bomb would explode on the ignition or when the car went over a set speed limit. Sometimes the bomb was placed inside a stolen car with false plates, parked along the route of the objective, and the explosive remotely activated when the target passed by (e.g. V.I.P. cars, police patrols or military vehicles).