The Revenue Commissioners have begun an investigation into all tax matters arising from the recent disclosures by AIB of inappropriate share dealings and offshore tax evasion.
The investigation into the AIB group, its related businesses and individuals will be led by the Revenue's Investigations and Prosecutions Division.
Two former senior executives at AIB have said they were connected to the Faldor offshore investment scheme.
Roy Douglas said that AIB invited him to join the scheme, and that he viewed it as a job perk.
But the former chief executive Gerry Scanlan has said that he and his wife were 'indirect and unknowing beneficiaries'.
AIB's share price rose by 2% today, despite the controversy.
The Bank of Ireland's share price rose by 4% after the weekend resignation of its Chief Executive, Michael Soden.
Top brass may have to go: Rabbitte
Labour Party leader Pat Rabbitte has said the people at the top of AIB may well have to leave their positions in the wake of the recent controversy.
Speaking on RTÉ Radio, Mr Rabbitte said people might have to go in order to save the reputation of the bank and the financial services sector.
Mulcahy resigns from Kingspan
Earlier today, former AIB Chief Executive Tom Mulcahy resigned from his position as a Non-Executive Director of the building materials' group, Kingspan, with immediate effect.
Mr Mulcahy is another of the former senior AIB executives described as having 'tax issues' in AIB's statement last Thursday.
Mr Mulcahy also quit his post as Executive Chairman of Aer Lingus on Saturday.
On Friday, Mr Mulcahy issued a statement saying he had no prior knowledge of the Faldor scheme, and that he was fully tax compliant.
Meanwhile, the Taoiseach has said that the future of AIB's Chief Executive Michael Buckley was a matter for the bank's management.
He added that as far as he was concerned Mr Buckley was a hard working civil servant and banker and his company needed good people to put their current problems right.
More information
Earlier, Tánaiste Mary Harney said AIB needs to provide more information on the latest scandal at the company.
She also said any inquiries into tax evasion in AIB by the regulator should be paid for by the bank itself, and not by the shareholders or taxpayers.
Speaking on RTÉ Radio, Ms Harney said the people responsible had to pay the cost of any inquiries.
Ms Harney said that if the tax evasion was shown to be a criminal matter, the gardaí should be called in.
