A 53-year-old man remains in Garda custody this morning following his arrest on Saturday night.
The arrest was made after officers stopped and searched a car on the Dundalk to Ardee road.
A gun and a quantity of ammunition were found in the car.
During a follow-up search of a premises in Co Louth, a firearm and stolen car were also recovered.
The man is being detained at Dundalk Garda Station.
