The notorious MMA athlete Conor McGregor has been widely criticised on social media after the star was filmed on CCTV punching an elderly man in a pub.
The incident is said to have occurred in April in The Marble Arch pub in Dublin, with the website TMZ Sports recently releasing the video.
In has been reported the 31-year-old was attempting to buy a round of his own 'Proper Twelve' whiskey for everyone in the pub.
However, the older gentleman twice declined the offer from the former UFC featherweight and lightweight champion, which led to McGregor violently lashing out and hitting the man in the head, who managed to stay on his feet.
The fighter, who had just downed his drink, then appears to be held off from committing any further offenses and is carried away by two other men.
It's not clear what happened after the incident but the video has reportedly been handed to Ireland's Director of Public Prosecutions by the police where a decision will be made as to whether the star will be charged.
A Garda spokesman is quoted by The Sun as saying:
(We) are investigating an incident at a pub in Drimnagh, Dublin, on April 6.
No arrests have been made. Investigations are ongoing.
Twitter users have widely condemned McGregor for his actions with some fans of the star admitting that they are disappointed to see him act towards the member of the public in such a manner.
Others used jokes to mock McGregor.
One fan shared a video of him pouring a bottle of McGregor's whiskey down a drain, adding that he can no longer support him.
McGregor is no stranger to controversy. In October the star made headlines after a mass brawl broke out following his loss to Khabib Nurmagomedov at UFC 229.
Prior to that, he had attacked a bus that Khabib was on smashing a window and injuring two people inside.