although the ira had sent Sending warnings Warning 90 minutes beforehand , the area was not fully evacuated Emptying .

at 12:30 am ( 0030 utc ) on sunday 4 march 2001 , the real ira , a dissident irish republican group , detonated Attack a car bomb outside the bbc 's main news centre within bbc television centre , on wood lane in the white city area of west london .

the ira accepted Receiving the terms of the good friday agreement Statement in 1998 as a negotiated end to the northern ireland conflict Hostile_encounter .

although manchester had been targeted Aiming by the ira before , it had not been subjected to an attack Attack on this scale .

since the provisional irish republican army ( ira or pira ) called Request a ceasefire and ended Process_end its campaign in 1997 , breakaway groups opposed Agree_or_refuse_to_act to the ceasefire and to the peace agreements ( `` dissident irish republicans '' ) have continued a low-level armed Bearing_arms campaign against the security forces in northern ireland .

at least 50 civilians ( and former combatants ) have also been killed Killing by republican paramilitaries , 29 of whom died Death in the omagh bombing Attack carried out Action by the real ira .

it was carried out Military_operation by a group calling themselves the real irish republican army , a provisional irish republican army ( ira ) splinter group who opposed Agree_or_refuse_to_act the ira 's ceasefire and the good friday agreement .

it was carried out Military_operation by a group calling themselves the real irish republican army , a provisional irish republican army ( ira ) splinter group who opposed Agree_or_refuse_to_act the ira 's ceasefire and the good friday agreement .

operation flavius was a military operation Military_operation in which three members of a provisional irish republican army ( ira ) cell were shot Use_firearm dead by undercover members of the british special air service Supply ( sas ) in gibraltar on 6 march 1988 .

these attacks Attack were the first in a year-long campaign by an ira active service unit who became Becoming known as the balcombe street gang UNK who police arrested in december 1975 after the balcombe street siege Besieging leading to their trial and conviction for other murders and offences .

the civil war Hostile_encounter was waged between two opposing Agree_or_refuse_to_act groups , the pro-treaty provisional government and the anti-treaty ira , over the anglo-irish treaty Ratification .

two senior royal ulster constabulary ( ruc ) officers , chief superintendent harry breen and superintendent bob buchanan , were shot Use_firearm dead Death in an ambush Attack by the provisional ira south armagh brigade .

the first bombing Attack in burgh quay may have been carried out Action by former associates Collaboration of the littlejohn brothers who were secret intelligence service Supply provocateurs , in a successful attempt to provoke Causation an irish government clampdown against the provisional ira , while the other three bombings were possibly perpetrated Committing_crime by loyalist paramilitaries , specifically the ulster volunteer force ( uvf ) , with british military or intelligence assistance .