The Garda Commissioner has tonight written to the clerk of Seanad Eireann seeking clarification of certain matters over controversial expenses claims from Senator Ivor Callely.

The allegations relate to the use of mobile phone receipts from a company that had ceased trading.

Minister of State Conor Lenihan has called on Senator Ivor Callely to clarify his position in relation to fresh expenses allegations which have emerged against him.

Senator Callely has been suspended from the Fianna Fáil party in the wake of the revelations, while a formal complaint has been made to gardaí by Green Party TD Paul Gogarty.

Speaking on RTÉ Radio, Mr Lenihan said the revelations are very serious and need to be addressed urgently.

Ivor Callely was staying at Cork home

Deputy Gogarty went to his local garda station in Lucan this morning and requested that an investigation be launched into Senator Callely's expense claims.

On RTÉ Radio's News at One Mr Gogarty said the allegations were 'serious' and that they needed to be explained.

Deputy Gogarty said he believed he had a duty to bring the matter to the attention of gardaí and request an investigation.

Yesterday, Mr Callely was suspended from Fianna Fáil without prejudice following fresh allegations in the Irish Mail on Sunday relating to the use of mobile phone receipts from a company that had ceased trading years earlier.

It is not known if the senator is still living at his Cork house as the internal Fianna Fáil investigation gets under way.

The Fianna Fáil party has said it has reviewed certain matters in the public domain and said that the information establishes a possible prima facie case of conduct unbecoming to a member of the Fianna Fáil organisation.

A five-member internal investigation team will report to the Fianna Fáil Ard Chomhairle in September.

Seanad Committee to meet

The Seanad Committee on Members' Interests is to meet at the end of this month to discuss the latest developments in the controversy.

The meeting will be held in private.

Mr Callely has already been suspended from the Seanad by the Committee for 20 sitting days.