Ashford House pub in Ashford, County Wicklow was broken into during the early hours of Sunday morning.
Gardaí have said the intruders gained entry to the pub through a window.
An amount of cash has reportedly been stolen from the premises.
The Gardaí Crime Scene Unit have arrived on the scene and are reviewing CCTV footage of the incident.
Gardaí have urged anyone with information or dash cam footage of the incident to contact Wicklow Garda Station on 0404 67107.