The Monbar Hotel attack was carried out by the Grupos Antiterroristas de Liberación (GAL), a Spanish state-sponsored death squad, on 25 September 1985 in Bayonne, Pyrénées-Atlantiques, France. The targets were four members of the Basque separatist group Euskadi Ta Askatasuna (ETA), whom the Spanish government believed to be senior figures in the organisation, itself proscribed as a terrorist group in Spain and France. All four people were killed, with a fifth person, apparently unconnected to ETA, injured in the shooting. This represented the deadliest attack carried out by the GAL. Although two of the participants were apprehended shortly after the shooting, controversy surrounded the possible involvement of senior figures in the Spanish police.