Omagh Bombing: Worst Atrocities Of The Troubles

July 21 1972 Bloody Friday: 11 killed when IRA sets off 26 Belfast bombs.

October-November 1974 Mainland pub bombings kill 28. Loyalists kill 22 in Dublin.

February 17 1978 Twelve Protestants die in IRA fireball bomb at Ulster hotel.

August 27 1979 Warrenpoint: IRA bomb kills 18 soldiers.

October 1984 Brighton: Five die when IRA bombs Tory conference hotel.

November 1987 Enniskillen: 11 die in IRA Remembrance Day bombing.

February 1996 Docklands: IRA blows up South Quay station. Two die.

July 1998 Three children burn to death during Drumcree stand-off.