Deputy First Minister Martin McGuinness has told the Prime Minister that a delay in publishing the Bloody Sunday report is unacceptable.
He and Sinn Fein president Gerry Adams met Gordon Brown in London.
The mammoth dossier from Lord Saville was made available to Government lawyers yesterday.
Thirteen people died after Paratroopers opened fire during a civil rights march in Londonderry in January 1972. Another person died of their injuries some time later.
Mr McGuinness said: “The imminent announcement of a British General Election should not be used by the British Government as an excuse to delay the publication of the Saville report.
“The families have already faced years of frustration in seeking the truth. After 12 years of the Saville Inquiry there should be no further delays.”
Government lawyers are to check the contents of the report for material which could pose a threat to life or national security ahead of publication.
Secretary of State Shaun Woodward confirmed the development in the House of Commons yesterday.
Once the report has been checked, Lord Saville will hand it to the Northern Ireland Secretary for publication.
This may be delayed until after a General Election.