Gardaí are appeafor witnesses to a robbery at a post office in Co Louth.

The robbery occurred at the building, which also functions as a convenience store, in Clogherhead, Co Louth last Tuesday at around 3.40pm.

Three men entered the shop wearing hi-vis jackets, carrying a firearm, sledge hammer and a metal bar.

They threatened staff and left the scene with a large amount of cash in a blue Audi A3 car, partial registration number 00RN.

Local gardaí were on the scene within minutes.

A search of the area was carried out with the assistants of Garda units from Drogheda and elsewhere from within the Louth Division.

The blue Audi A3 was located, on fire, in a field at Coast Road, Callystown, Clogherhead a short time later.

It is believed that the culprits then left this area in a silver coloured Skoda that was parked at the entrance to this field.

This car was being driven by a woman with red hair.

Gardaí are appealing for witnesses and anyone with information, particularly those who were in Clogherhead Village on Tuesday between 3.30-3.45pm or who may have observed the blue Audi A3 prior to its arrival at Clogherhead Village or subsequently at Coast Road, Callystown or who may have observed the silver Skoda in the Clogherhead area around the time of the robbery, to contact them at Drogheda Garda Station on 041 9874200, The Garda Confidential Line, 1800 666111 or any Garda Station.