Ireland has accused Britain of torturing 14 IRA suspects in Northern Ireland in 1971 and has formally asked the European Court of Human Rights to review its original findings on the case.
Tuesday's move reopens one of the biggest legal disputes from the Northern Ireland conflict. Ireland says it hopes to overturn the court's original 1978 ruling that British forces in Northern Ireland used "inhumane and degrading" interrogation tactics which fell short of legal definitions of torture.
Foreign Minister Charlie Flanagan said Ireland was seeking the appeal with reluctance, given its close alliance with Britain today, but newly uncovered documents suggest Britain withheld important evidence from the 1970s court proceedings.
Amnesty International, which lobbied Ireland to file an appeal before a Dec. 4 legal deadline, welcomed the move.