A man with an Irish accent made a telephone call to the Birmingham Post and Evening Mail, claiming to be from the town centre and claiming to have information about the whereabouts of an Irish Republican Army (IRA) bomb which had been planted in the town. The caller claimed that the bomb had been intended to cause an explosion which would have killed all the "scrubbers". A niece was killed and nine others were injured when they were caught up in the bombs which exploded in the two pubs. The Birmingham pub bombings were believed to have been carried out by a member of the IRA's Provisional IRA group. Image copyright Getty Images Image caption Twenty-one people were killed. Only two men have been convicted of the bombing, but no - one has been brought to justice. It has been suggested that IRA officials may have been involved in the planning of the atrocity, but this has been denied. It has been suggested that the IRA unit responsible for the Birmingham killings may have been involved in the planning and execution. The relatives of those killed have been campaigning for a full public inquiry into the killings for more than 20 years. Image copyright Pacemaker Image caption The death toll from the County Antrim pub bombings was the highest in a single day in the Troubles. In a statement, he said: "It is not known who planted the bombs in the Mulberry Bush and the Tavern in the Town but it is clear who placed the bombs at the Tavern. "It is known that Mr Hayes, who was living in south Dublin at the time, defused a bomb in Birmingham's Hagley Road the day before he carried out the Mulberry Bush bombing but it is not known if he was involved in the Tavern in the Town explosion." A number of civilians were evacuated from the scene. Victims' families have expressed their shock and grief. Image copyright Getty Images Image caption The attack has been described as a "heinous act of terrorism" Image copyright Getty Images Image caption Corporation Street in Birmingham was the scene of one of the Birmingham bomb attacks in 1974. In County Antrim, Benita Stipp and Mimi Ferguson, who were students at the time of the bombing, were the two people who died in the blast, as were two other students. The attack was condemned by the Irish Republican Army (IRA) and Sinn Féin. During his time at Elvington Airfield, near York, York, in the UK, Carl Thomas had been involved in the construction of a radar station, which was to be used by the Royal Ulster Constabulary (RUC) and the British Army. The pair, who were born and raised in the UK but grew up in the mountains of the north-west of England, were homeschooled students who had studied in Belgium before going to the Department for Education in London, but after finishing their studies in the Albanian mountains, the pair returned to their home country to work as teaching candidates in the Department of Education in the country, and to work with their teachers. After the attack, James Boyle was arrested by West Midlands Police but he was released after being questioned by the police and released on bail, and was due to appear before a judge on Monday. Police believe he was a member of the IRA in Ireland and in England, and that he was based in Birmingham, but that he had been active in the IRA both in England and in Ireland. 2 of the 3 men convicted of the bombings have been released on appeal. They had their convictions quashed on appeal after serving 16 years in prison and their trial was heard by the Court of Appeal. They were released on compassionate grounds after a judge ruled that they had suffered a miscarriage of justice.