Police will pursue new leads into the Poppy Day Massacre at Enniskillen rigorously, Deputy Prime Minister Nick Clegg has said.
Eleven people died and 63 were injured when the IRA bombed a remembrance service at the Co Fermanagh town's cenotaph in 1987. A twelfth victim, school principal Ronnie Hill, spent 13 years in a coma and died in 2000 following the bomb, which exploded without warning.
No one has ever been convicted in connection with the massacre, deemed among the worst of the Troubles.
But as the families of the victims prepared to mark the 25th anniversary of the attack on Thursday, a new report by the Historical Enquiries Team (HET) has been passed to serious crime branch detectives who will determine whether fresh criminal proceedings can be brought against the IRA perpetrators.
Standing in for David Cameron at Prime Minister's Questions, Mr Clegg said the police would have all the resources they needed to pursue new leads.
The DUP's Jim Shannon asked the Deputy Prime Minister: "Will you join with me in echoing the survivors' call for justice and for new information to be brought forward?"
Mr Clegg replied: "This is an extraordinarily difficult week for all those that suffered at that time and have had to live with the memories ever since.
"Of course I can confirm that where there are new leads, where there is new evidence, that will be pursued rigorously and we will provide all support to make sure that is the case."