A man has been charged in connection with the murder of Denis Donaldson in Donegal in 2006.
The former leading Sinn Fein member was shot dead at a remote cottage near Glenties after it emerged he was a British agent, working for police and M15 from inside Sinn Féin for 20 years.
No one has ever been convicted of his murder.
A garda spokesperson said officers investigating Denis Donaldson’s murder today arrested a man in his late 40s following his extradition from Scotland on foot of a European Arrest Warrant.
The man will appear before the Special Criminal Court in Dublin this afternoon.
“The arrest was carried out with the assistance of An Garda Síochána Extradition Unit, Garda National Bureau of Investigation and the Irish Air Corps,” added the garda spokesperson.
“An Garda Síochána has no further comment at this time.”