civilian (James Brown, aged 26) was found shot dead on Foyle Road, Derry; the IRA claimed he was an informer. 2 October 1973: an IRA incendiary bomb caused extensive damage to a department store in Colchester, Essex; another IRA firebomb caused damage at Heathrow Airport. 3 October 1973: a British soldier (Lindsay Dobie, aged 23) was killed by a booby-trap bomb in a parcel left at Bligh's Lane British Army Base, Derry. 3 October 1973: the IRA shot dead a former UDR soldier (Ivan Vennard, aged 32) in Lurgan, County Armagh. 4 October 1973: four people were injured when an IRA bomb exploded at a British Army careers office in London. 12 October 1973: a civilian (Raymond McAdam, aged 24), killed in an IRA bomb attack on shop, Annaghmore, near Newtownbutler, County Fermanagh. 16 October 1973: the IRA shot dead a patrolling RUC officer (William Campbell, aged 27), near Capital Cinema, Antrim Road, Belfast. 28 October 1973: an IRA sniper shot dead a patrolling British soldier (Stephen Hall, aged 27) in Crossmaglen, County Armagh. 28 October 1973: the IRA shot dead an off-duty RUC officer (John Doherty, aged 31, a native of County Donegal), near his mother's home, Lifford, County Donegal. 31 October 1973: Mountjoy Prison helicopter escape. Three IRA volunteers escaped from Mountjoy Prison, Dublin after a hijacked helicopter landed in the exercise yard. One of the escapees was former IRA Chief of Staff Seamus Twomey. 6 November 1973: an IRA sniper shot dead a patrolling British soldier (John Aikman, aged 25) in Newtownhamilton, County Armagh. 13 November 1973: a civilian (Bernard Teggart, aged 15) was found shot near Floral Hall, Zoological Gardens, Antrim Road, Belfast. The IRA claimed he was an informer. 14 November 1973: a civilian (John Lundy, aged 61) was killed during an IRA sniper attack on a British Army observation post on Moira Street, Short Strand, Belfast. 14 November 1973: a civilian (Kathleen Feeney, aged 14) was killed during an IRA sniper attack on a British Army patrol on Lecky Road, Derry. 15 November 1973: the RUC shot dead an IRA volunteer (Michael McVerry, aged 23) during gun attack on Keady British Army (BA)/Royal Ulster Constabulary (RUC) base, County Armagh. 18 November 1973: IRA snipers fired shots at a Saracen armoured vehicle in the Clonard area, at two British Army patrol in Low Ormeau and at an RUC station at Glengormey, all the locations in