Tánaiste Leo Varadkar met gardaí voluntarily earlier this month in relation to an investigation into the circumstances surrounding the disclosure of a confidential Government document to a friend two years ago.

A spokesperson for Mr Varadkar said he made a full statement and answered all questions when he met gardaí by appointment.

"On advice the Tánaiste cannot say anything further until the investigation is complete," the spokesperson said.

"He has made a full account to the Dáil on this matter and looks forward to it being concluded," they added.

Mr Varadkar has previously told the Dáil he gave a copy of an agreement between the State and the Irish Medical Organisation to Maitiú Ó Túathail, the then president of a rival GP organisation, the National Association of General Practitioners, in April 2019.

Making the statement in the Dáil last November, Mr Varadkar apologised for "errors of judgement".

Last month gardaí confirmed that an investigation had been launched into the matter.

It will determine the facts surrounding the incident and gather evidence for a file to be submitted to the Director of Public Prosecutions.

The DPP will decide whether or not any laws may have been broken and whether or not criminal charges are to be preferred.

The investigation is being carried out by the National Bureau of Criminal Investigation, which is under the overall command of Assistant Commissioner John O' Driscoll, the head of organised and serious crime.

The investigation is focused on potential breaches of existing legislation, such as the Official Secrets Act or the Criminal Justice Acts.

Gardaí have already received statements from a number of people, including Minister for Higher Education Simon Harris, who was minister for health at the time.

Garda Headquarters has said it does not comment on ongoing investigations.