Gardai stormed a packed shebeen in Co Mayo on Sunday as a number of drinkers were caught red-handed in the homemade pub.
Officers obtained a warrant and searched the outhouse in the Westport area at around 8.15pm on Sunday, January 3.
During the raid gardai found a number of people drinking alcohol and told them that they were breaching the current COVID-19 regulations in relation to indoor gatherings.
Officers found a fully equipped bar with taps for draught stout and lager and a proper cooling unit under the counter. Barrels were kept outside in a deep freeze unit
They also seized a sum of cash and documents, as well as a significant amount of alcohol (cans, spirits, wine and barrels), glasses, beer taps, and a cooling unit.
A garda spokesman said: "A full investigation is now underway into this matter and files will be prepared for the Director of Public Prosecutions.
"An Garda Síochána would appeal to anyone with information about the operation of illegal Shebeen’s to contact their local Garda Station.
"In addition to potential criminal breaches by the operator, An Garda Síochána wants to remind every person of their social and personal responsibility not to frequent premises or engage in activity which is likely to contribute to the increasing spread of the Covid-19 virus.
"The Covid-19 pandemic remains a public health crisis and a real threat to everyone, particularly the most vulnerable in our society, the virus is still spreading, it is still leading to serious illness and death.
"An Garda Síochána continues to appeal to all citizens to comply with Public Health Guidelines and Regulations in order to continue to save lives."
