CIRA planted a hoax van bomb on Craigavon Bridge in Derry, shortly before the start of the Apprentice Boys' parade through the city. Disturbances broke out during the march when loyalist bandsmen broke ranks to attack nationalist residents who were watching the parade. 16 September: The CIRA claimed responsibility for exploding a van bomb outside the Royal Ulster Constabulary (RUC) base in Markethill, County Armagh. The bombing happened a day after Sinn Féin joined the political negotiations which led to the Good Friday Agreement. 16 October: the CIRA claimed responsibility for a hoax bomb scare at a public meeting addressed by Unionist politicians Peter Robinson, Robert McCartney, and Nelson McCausland. 30 October: The CIRA claimed responsibility for planting a holdall bomb in an office of a government building in Derry. The bag contained a quantity of Semtex and petrol, but failed to detonate properly. 20 November: The CIRA planted a small bomb behind Belfast City Hall. The Progressive Unionist Party claimed the device was aimed at their ground floor office. 1998 Note: for some of the incidents in 1998, it is unclear whether the Continuity IRA, the Real IRA, or both organizations were responsible: 6 January: A car bomb was defused by the security forces in the centre of Banbridge, County Down. A telephoned warning had been sent. 24 January: Following a telephoned warning, a car bomb exploded outside the 'River Club' on Factory Road in Enniskillen, County Fermanagh. The building was extensively damaged, but there were no injuries. It is believed the CIRA was responsible. 20 February: Following a telephoned warning, a car bomb exploded outside the RUC base in Moira, County Down. Seven RUC officers and four civilians were hurt. The blast caused widespread damage. 23 February: Following a telephoned warning, a car bomb exploded near the RUC base on Edward Street in Portadown, County Armagh. The blast caused widespread damage but no injuries. 20 March: A bomb was left in the Northern Bank on Guildhall Square, Derry, and the area was cleared for four hours while the British Army defused it. The CIRA claimed responsibility and said a Republican had tried to stop the CIRA members from planting the bomb. 4 May: There was an attempted mortar attack on Grosvenor Road RUC base in Belfast. One of the mortars fell short of the target and the other exploded in its launch tube. 9 May: There was a