Northern Ireland's five main political parties have urged Independent TD Mick Wallace to pass any information he has about irregular activities around a major property deal in Northern Ireland on to gardaí.

Mr Wallace claimed in the Dáil yesterday that £7m (€9.85m), reportedly earmarked for a Northern Ireland politician, had been found in an Isle of Man bank account.

He claimed the money was linked to a major property deal when the entire Northern Ireland property portfolio of NAMA was sold last year to a US company, for a fraction of its £4.5bn book value.

Tonight the US company that bought NAMA's Northern Ireland portfolio issued a statement with additional information about its relationship with the Belfast-law firm, Tughans.

Yesterday Tughans issued a statement saying a former partner had diverted to an account of which he was the sole beneficiary professional fees due to the firm. 

Tughans also said it has since retrieved the money, the person concerned has left the practice and the Law Society has been informed about the matter.

Tonight, Cerberus,  the successful bidder for the property portfolio, said is not has never has been a client of Tughans, but was advised by Brown Rudnick, a US firm it appointed as its lawyers, that it would seek local counsel support in Northern Ireland by Tughans and would be paying Tughans out of its fees.

Cerebrus also repeated that no improper or illegal fees were paid by it on its behalf and the company takes any allegation to the contrary extremely seriously.

When Mr Wallace raised the issue in the Dáil yesterday, Tánaiste Joan Burton urged him to bring the matter to the attention of gardaí.

NI First Minister Peter Robinson said this morning that "those with information should give it to the authorities to test its credibility in a thorough investigation".

Deputy First Minister Martin McGuinness said he would encourage Mr Wallace to speak to An Garda Síochána and the PSNI as a matter of urgency.

The Ulster Unionist Party, the SDLP and Alliance Party leader and Justice Minister David Ford have made similar comments.

The finance committee of the Northern Ireland Assembly, chaired by Sinn Féin Assembly member, Daithi McKay, is expected to meet in emergency session on Tuesday next to consider the controversy. 

But Mick Wallace told RTÉ News this afternoon he is unlikely to take up the invitation to give evidence to the finance committee.