The British government is planning to publish only a heavily-censored version of a report on four controversial killings in the North, it was claimed last night.
Sinn Féin Assembly member Ms Bairbre de Brúwarned the British government of the impact of it editing retired Canadian Judge Peter Cory's report.
Seven US senators, including Democratic presidential candidate Mr John Kerry, have written to the British prime minister calling for the release of the report.
After a meeting yesterday with Northern Ireland Office minister Mr John Spellar, Ms de Brúsaid she was alarmed he was unable to give guarantees Judge Cory's report would be released in full.
"Sinn Féin is especially concerned that when we raised the need for the Cory Report to be published in full and uncensored we could not get a commitment from him that that would be the case," the West Belfast MLA said.
"Clearly there is a strict refusal by the British government to release the Cory Report in full yet the Irish Government, when it was also handed its report by Judge Cory, was able to do so last December full and uncensored.
"You have to ask why is the British government reluctant to release the Cory Report in full."
Judge Cory is believed to have asked for a full inquiry into each of the four cases and contacted the Finucane, Wright, Hamill and Nelson families in January to inform them of his decision.
Last week the British government said it was intending to release the report by the end of the month after three of the families took legal action to force its publication.
The Government asked Judge Cory to examine two controversial killings that occurred in the Republic and his report into these killings was released before Christmas. Judge Cory's recommendation that there should be a public inquiry into one of the cases has been followed.
The inquiry will look into alleged collusion between members of the Garda and the IRA in the double murder of senior RUC officers Harry Breen and Bob Buchanan in 1989.
The British government has said security and legal implications have caused the delay in the release of its report.
In a letter to Mr Blair, seven US senators, including Mr Edward Kennedy, said the delay was damaging confidence. "It is of grave concern that your government's handling of this matter is jeopardising much of the progress made to date in achieving a new beginning for policing in Northern Ireland," the letter stated.