patrol passed by, Dungannon, County Tyrone. 14 April 1974: The IRA shot dead an undercover British soldier (Anthony Pollen, aged 27), observing a republican commemoration parade at Meenan Square, Bogside, Derry. 16 April 1974: An IRA sniper shot dead an RUC officer (Thomas McCall, aged 34), outside Newtownhamilton RUC base, County Armagh. 18 April 1974: A civilian (Seamus O'Neill, aged 32), was killed when he triggered a booby-trap bomb on his farm, The Loup, near Moneymore, County Londonderry. It exploded about 8 ft from his tractor as he drove past Saltersland church hall. There had been a small explosion there earlier in the day. It is believed both bombs were planted by the IRA and that the second bomb was for security forces investigating the first. 20 April 1974: A civilian (James Corbett, aged 20), was shot dead by the IRA as an alleged informer. His body was found by the side of Upper Springfield Road, Hannahstown, Belfast. 22 April 1974: A civilian (Mohammed Khalid, aged 18), who worked for the British Army was shot dead by the IRA in his car at Silverbridge, County Armagh. 1 May 1974: A British outpost came under IRA attack at Crossmaglen, County Armagh. It was hit by three rockets and a 15-minute gun-battle followed. No injuries were reported. 2 May 1974: Up to 40 members from the Provisional IRA East Tyrone Brigade attacked the isolated 6 UDR Deanery base in Clogher, County Tyrone with machine gun and RPG fire resulting in the death of Private Eva Martin, a UDR Greenfinch, the first female UDR soldier to be killed by enemy action. 10 May 1974: The IRA shot dead two patrolling RUC officers, Brian Bell (aged 29) and John Ross (aged 40), on Finaghy Road North, Finaghy, Belfast. 13 May 1974: Two IRA volunteers, Eugene Martin (aged 18) and Sean McKearney (aged 19), were killed when their bomb prematurely exploded at a petrol filling station, Donnydeade, near Dungannon, County Tyrone. 18 May 1974: The IRA is blamed of a car bomb that exploded at Heathrow airport; three people were wounded and about 50 cars destroyed. 31 May 1974: A former Royal Navy serviceman, Alfred Shotter (aged 54), was killed by an IRA booby trap bomb hidden in a dustbin at his former home, Strabane Old Road, Gobnascale, Derry. It is believed to have been planted by the IRA. 5 June 1974: An IRA sniper