Latest: Man released without charge following arrest in connection with Denis Donaldson murder in 2006

Latest: A man who was arrested as part of a Garda investigation into the murder of Denis Donaldson has been released without charge.

Update 3.30: One of two men arrested in connection with the murder of Denis Donaldson in Co. Donegal, has been released without charge. 

Donaldson, who was exposed as a British spy, was killed near Glenties in April 2006.