The incident happened last Thursday morning.
Gardaí are issuing a fresh appeal for information on the robbery of a Laois post office.
It occurred in Mountmellick at about 10 o'clock last Thursday morning.
A man is reported to have threatened staff with a firearm while demanding cash.
Anyone who may have been in the area between 9am and 11am or who may have dashcam footage is being asked to contact Portlaoise Garda Station.