The Taoiseach, Mr Ahern, will attend an Omagh memorial service in the Pro-Cathedral in Dublin on Saturday. A spokeswoman for the President said as Mrs McAleese was on holiday she would be unable to attend any of the services this weekend.
A senior member of the Cabinet is expected to represent the Government on Saturday at a service in Omagh to mark the first anniversary of the bomb attack by dissident republicans in the Co Tyrone town.