Investigations are continuing this morning after the discovery of a loaded sub-machine gun in Lucan, west Dublin.

Gardaí have arrested a 20-year-old man and he is being questioned at Ronanstown Garda Station, were he can be held for up to 72 hours.

Additional ammunition was also found in the Balgaddy area of Lucan on Sunday evening.

The raid was carried out by detectives from the Garda Drugs and Organised Crime Bureau as part of an operation targeting serious criminal activity.

Investigations are ongoing.