On 20 December 1972, during the height of the Northern Ireland Troubles, a mass shooting took place at the Top of the Hill bar in a small Catholic enclave of the majority Protestant Waterside area of Derry. Five civilians were shot dead by Loyalist paramilitaries from a unit of the Ulster Freedom Fighters (UFF), which is a part of the Ulster Defence Association (UDA). The shooting is also known locally as the "Annie's Bar massacre".