Bloody Sunday, demonstration in Londonderry (Derry), Northern Ireland, on Sunday, January 30, 1972, by Roman Catholic civil rights supporters that turned violent when British paratroopers opened fire, killing 13 and injuring 14 others (one of the injured later died). Bloody Sunday precipitated an upsurge in support for the Irish Republican Army (IRA), which advocated violence against the United Kingdom to force it to withdraw from Northern Ireland. The incident remained a source of controversy for decades, with competing accounts of the events. In June 2010 the Saville Report, the final pronouncement of a government inquiry initiated by British Prime Minister