Editing Sean O'Callaghan (section)

==Provisional Irish Republican Army activity==
After becoming a full-time paramilitary with the IRA, in the early to mid 1970s O'Callaghan took part in over seventy operations associated with [[Irish Republican]] political violence including bomb materials manufacture, attacks on IRA targets in Northern Ireland, and robberies to provide funding for the organisation.<ref name="obit">[https://www.independent.co.uk/news/obituaries/sean-o-callaghan-ira-defector-a7916436.html Sean O’Callaghan, high-ranking IRA bomb maker turned informant], 'The Independent' 28 August 2017.</ref> On 2 May 1974 he was part of an attack by an IRA force on a [[6th Battalion, Ulster Defence Regiment]] (UDR) base at the village of [[Clogher]] in [[County Tyrone]], with sustained automatic-rifle fire, [[RPG-7|anti-tank rockets]], and rounds fired from an improvised mortar which was operated by O'Callaghan.<ref>'The Royal Irish - The Irish Soldier in Service to the Crown' website. Account of the attack on the UDR Clogher base on 2 May 1974. https://www.royal-irish.com/events/first-female-soldier-udr-pte-eva-martin-killed-ira-clogher</ref><ref>'James Connolly, My Search for the Man, the Myth and his Legacy', by S. O'Callaghan (Pub. Century, 2015), pp. 226–7.</ref> During this attack a female UDR recruit was killed.<ref>O'Callaghan, Sean (1999). ''The Informer''. London: Corgi Books. pp. 95–99; {{ISBN|0-552-14607-2}}</ref> On 23 August 1974 O'Callaghan killed Detective Inspector Peter Augustine Flanagan, a 47-year-old Catholic police officer and head of the Omagh Division of the [[RUC Special Branch|Royal Ulster Constabulary's Special Branch]], by shooting him repeatedly with a handgun in a two-man IRA attack in a public house in the town of [[Omagh]] in County Tyrone.<ref>Photo of Peter Flanagan, Victor Patterson website (2018). https://victorpatterson.photoshelter.com/image/I0000rCF7LUZXkrE</ref><ref>O'Callaghan, pp. 103–13</ref>