The Irish Football Association look certain to demand answers from FIFA after another youngster decided he would rather play for the Republic of Ireland.

Manager Nigel Worthington believes there could be flaws in a system that allows players who have come through the age groups with one nation to represent another country.

Worthington has failed in his attempt to persuade promising Everton defender Shane Duffy his long-term international future lies with the province.

Instead the 18-year-old has withdrawn from the squad to face Albania in a friendly on March 3.

Duffy's decision to switch allegiance to the Republic follows those of Manchester United midfielder Darron Gibson and Portsmouth defender Marc Wilson.

Wilson has been named in the Republic squad for the first time as they prepare to meet Brazil.

In a brief statement the Irish FA said it was aware of the situation regarding player eligibility and added: 'The association is discussing internally a planned course of action. No further comments will be made at this stage.'