Cairo Gang was a group of British intelligence agents who were sent to Dublin during the Irish War of Independence to conduct intelligence operations against prominent members of the Irish Republican Army ( IRA ) – according to Irish intelligence with the intention of assassinating them . Twelve men including British Army officers , Royal Irish Constabulary officers and a civilian informant were killed on the morning of 21 November 1920 by the Irish Republican Army in a planned series of simultaneous early-morning strikes engineered by Michael Collins . The events were the first killings of Bloody Sunday
Bloody Sunday
Bloody Sunday (1920)
Cairo Gang