Original: The Omagh bombing was a paramilitary car bomb attack carried out by the Real Irish Republican Army (RIRA), a splinter group of former Provisional Irish Republican Army members opposed to the Belfast Agreement, on Saturday 15 August 1998, in Omagh, County Tyrone, Northern Ireland.
Simplified: The Omagh bombing was a bomb attack by the Real Irish Republican Army in Omagh, Northern Ireland, on August 15, 1998.