GARDAÍ investigating the murder of Denis Donaldson have arrested two men in Co Donegal.
The men, one his forties and the other in his seventies, were being questioned at Letterkenny Garda Station on Tuesday evening.
Mr Donaldson (55), a former senior Sinn Féin official from east Belfast, was shot dead at a remote cottage at Cloghercor, Doochary, Co Donegal, in April 2006.
Four months earlier he had been expelled from the party after he admitted he had been a paid British agent since the 1980s.
Mr Donaldson had been living at the cottage since his exposure as an MI5 agent.
Dissident republican group the Real IRA have claimed responsibility for the murder but the circumstances surrounding Mr Donaldson's outing as an agent and subsequent assassination have been shrouded in mystery.
Mr Donaldson's family have previously hit out over ongoing delays in holding an inquest into his death.
The latest hearing took place at Donegal Coroners' Court in April, when coroner Denis McCauley granted an adjournment until August 31.
