A report into an alleged 'smear campaign' against Garda whistleblowers is due to be published today.

Former High Court Judge Iarfhlaith O'Neil has been investigating claims that Commissioner Nóirín O'Sullivan was part of the tactics.

It's understood two senior Gardaí have said they were ordered to discredit whistleblowers.

Back in October the report was promised within six weeks.

Special Correspondent with the Irish Examiner, Mick Clifford, broke the story: