Gardaí investigating dissident republican activity have arrested a 53-year-old man in County Louth.

The arrest was made after a Garda Special Detective Unit team and members of the Emergency Response Unit stopped and searched a car on the Dundalk to Ardee Road last night.

During the course of the search of the car, they found a firearm and ammunition.

The man arrested by gardaí is being detained at Dundalk Garda station under section 30 of the Offences Against the State Act.

During a follow up search of a premises in Co Louth, a firearm and stolen car were also recovered.