Amnesty International join Omagh bomb inquiry call 8 August 2013 Last updated at 00:00 Amnesty International has joined Omagh bomb families in calling for a public independent inquiry into the Real IRA atrocity and the investigation into it. Twenty-nine people were killed in the car bomb attack on 15 August 1998. Later on Thursday, the families will release parts of a report commissioned three years ago into the investigations on both sides of the border. They say they presented it to the British and Irish governments over a year ago and have not had a response. Michael Gallagher, whose son Aidan was murdered in the attack, said it contained "sensitive" material. Amnesty said an inquiry was needed to comprehensively investigate the circumstances surrounding the bomb attack and to ensure lessons are learnt. It has urged the government to establish an independent inquiry without delay, and called on the Irish and United States governments to offer full cooperation with the work of such an inquiry. Amnesty said there were unanswered questions about the gathering and sharing of intelligence material both between domestic agencies (for example between the RUC and MI5) and international agencies (the UK authorities, Irish police and the United States' FBI). Broader public interest The group's Patrick Corrigan said: "Fifteen years since the bomb ripped through Omagh, taking lives and causing injury, the families bereaved and those injured by the bomb are still left seeking the full truth about what happened that day and whether it could have been prevented. Beyond addressing the families' need for answers, there remains a broader public interest in establishing such an inquiry, in order to prevent such a tragedy recurring. He added: "The families have had to suffer the indignity of being drip-fed information over the years, with new wounds opened each time and with none of the bombers ever being held criminally responsible. It is doubly sad that the bereaved families and those injured have now had to commission their own report as a result of the many partial investigations, each one of which opens up new questions. Among the 29 people killed in the atrocity was a woman pregnant with twins. About 220 people were also injured. No-one has been convicted over the bombing, but four men - convicted Real IRA leader Michael McKevitt, Liam Campbell, Colm Murphy and Seamus Daly - were found liable for it after a civil case taken by the families.