The Taoiseach has said that gardaí are closely monitoring a number of individuals in Ireland suspected of being al-Qaeda sympathisers.

Speaking earlier at Dublin City University, Bertie Ahern said he accepted that there were some people in the Republic to whom huge importance had to be attached.

Mr Ahern also said that security measures have been taken here in the wake of the London bombings, but that he did not believe the use of Shannon by US troops raised our risk profile.