A Supreme Court Judge has 'unreservedly apologised' for attending the Oireachtas Golf Society event in Galway on Wednesday.
Gardaí are now investigating the event for alleged breaches of public health legislation.
It comes as Agriculture Minister Dara Calleary resigned over attending, with Taoiseach Micheál Martin saying the event "should not have gone ahead".
While Senator Jerry Buttimer also resigned as Leas-Cathaoirleach of the Seanad for attending the same event.
He described it as a "serious lapse of judgement".
Mr Justice Seamus Woulfe is a current Supreme Court Judge and former Attorney-General.
In a statement on Friday, he said: "I confirm that I attended one day of the Oireachtas Golf Society outing in Ballyconneally on Wednesday 19th August, as an invited guest.
"I was not aware in advance that there was going to be an organised dinner as part of the event.
"On learning of the proposed dinner during the course of that day, my understanding was that the organisers and the hotel had satisfied themselves that they would be operating within Government pubic health guidelines.
"I attended based on that understanding, that it would be within the guidelines, but do apologise for any unintentional breach of any of the new guidelines on my part.
"I would never disregard governmental or health authorities advice regarding public health, and have been at pains to follow rules and guidelines since their introduction in March.
"That I ended up in a situation where breaches may have occurred, is of great regret to me, and for which I am sorry.
"I unreservedly apologise".
