The man in his twenties was arrested in Dublin earlier this evening

Gardai have arrested a man in Dublin as part of the ongoing investigation into the murder of Detective Adrian Donohoe 5 years ago.

He was murdered during an armed robbery at the Lordship Credit Union, Belurgan, Jenkinstown, Dundalk, Co Louth on the 25th January 2013.

A man in his twenties was arrested outside Wheatfield prison yesterday evening after he finished a jail sentence for traffic offences.

He is currently being questioned at Dundalk Garda station under section 50 of the Criminal Justice Act.

Gardai have been liasing with several international police organisations, including the FBI and PSNI, as part of the investigation into Detective Donohoe's death.