Gardaí broke up a dinner of some 30 people that took place after a match in Co Roscommon.
The Roscommon senior team played Donegal in a challenge game in Sligo on Saturday and after the game, members of Roscommon GAA, including players, stopped in Boyle for a post-match meal.
Around 30 people attended the dinner in St Joseph's Hall, where they ate chicken curry and salad, which was "nothing fancy", according to Roscommon GAA.
Following reports of potential breaches of coronavirus guidelines, gardaí attended the hall at around 4.30pm and "a group of people" agreed to leave.
A Garda investigation is now under way, focusing on the organisers of the event.
Roscommon GAA maintains the group were "socially distant" while eating the meal in the hall and that their actions were 'in compliance' with Covid protocols for elite sports.