The group that took responsibility for a mass shooting that happened in 1993 blamed it on an event carried out by who?
Greysteel massacre: The Greysteel massacre was a mass shooting that happened on the evening of 30 October 1993 in Greysteel, County Londonderry, Northern Ireland. Greysteel massacre:  The group claimed responsibility using their cover name "Ulster Freedom Fighters" and said that the attack was revenge for the Shankill Road bombing by the Provisional IRA a week earlier. Shankill Road bombing: The Shankill Road bombing was an operation carried out by the Provisional Irish Republican Army (IRA) on 23 October 1993 and is one of the most notorious incidents of the Troubles in Northern Ireland.
Provisional Irish Republican Army