MMA superstar Conor McGregor is making headlines outside the octagon once more after a video appears to show the fighter hitting a man in a pub.
The incident reportedly took placed at The Marble Arch Pub in Dublin on April 6 this year.
In the video obtained by TMZ, McGregor is seen twice trying to give the man a glass to sample of his Proper 12 branded whiskey.
Aug 26, 2017; Las Vegas, NV, USA; Floyd Mayweather Jr. lands a hit against Conor McGregor during their boxing match at the at T-Mobile Arena. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports/Sipa USA
File photo dated 25-08-2017 of Conor McGregor.
Conor McGregor and Conor Jack McGregor Jr. on the field during the pre-game of Super Bowl LIII at Mercedes-Benz Stadium in Atlanta, Georgia on Feb. 3, 2019. (Photo by Anthony Behar/Sipa USA)
Conor McGregor leaves Dublin District Court after appearing in relation to motoring offences.
Conor McGregor leaving Naas District Court in Co Kildare, where he was disqualified from driving for six months and fined 1,000 euro after admitting driving at 154 kilometres per hour in a 100 zone.
Conor McGregor arrives at Naas District Court in Co Kildare, where he is facing a speeding charge.
April 6, 2018- New York Police 78th precinct in Brooklyn for the arrest of Conor McGregor and Cain Calloway. New York Police Department officers take them from the police station to Brooklyn Central Booking and then to the courthouse for the arraignment. Conor McGregor (Photo by Globe Photos/Sipa USA)
Conor McGregor attending the Fashion Awards 2017, in partnership with Swarovski, held at the Royal Albert Hall, London. Picture Credit Should Read: Doug Peters/ EMPICS Entertainment
Conor McGregor leaving Blanchardstown District Court in Dublin, where he was facing a speeding charge.
Conor McGregor with his partner Dee Devlin on arrival at the Conor McGregor: Notorious premiere at the Savoy Cinema in Dublin.
Aug 26, 2017; Las Vegas, NV, USA; Floyd Mayweather Jr. (black trunks) is taunted by Conor McGregor (white trunks) during their boxing match at T-Mobile Arena. Mayweather won via tenth round TKO. Mandatory Credit: Joe Camporeale-USA TODAY Sports
Conor McGregor taunts Floyd Mayweather Jnr during their fight at the T-Mobile Arena, Las Vegas.
Conor McGregor following defeat to Floyd Mayweather Jnr during their fight at the T-Mobile Arena, Las Vegas.
Aug 26, 2017; Las Vegas, NV, USA; Floyd Mayweather Jr. lands a hit on Conor McGregor during a boxing match at T-Mobile Arena. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports
Aug 25, 2017; Las Vegas, NV, USA; Conor McGregor wears Gucci sun glasses and Beats by Dre headphones during weigh ins for the upcoming boxing match at T-Mobile Arena. Mandatory Credit: Mark J. Rebilas-USA TODAY Sports
Aug 25, 2017; Las Vegas, NV, USA; Conor McGregor weighs in for his upcoming boxing match against Floyd Mayweather Jr. (not pictured) at T-Mobile Arena. Mandatory Credit: Joe Camporeale-USA TODAY Sports
Floyd Mayweather Jr and Conor McGregor during the weigh in at the T-Mobile Arena, Las Vegas, Nevada.
Jul 12, 2017; Toronto, Ontario, Canada; Conor McGregor taunts Floyd Mayweather as he speaks during a world tour press conference to promote the upcoming Mayweather vs McGregor boxing fight at Budweiser Stage. Mandatory Credit: Tom Szczerbowski-USA TODAY Sports *** Please Use Credit from Credit Field ***
UFC star Conor McGregor pictured on day three of the Forbidden Fruit Festival in Dublin.
Ireland's Conor McGregor arrives for his 5-Round Featherweight bout against Brazil's Diego Brandao at the UFC Fight Night at the O2 in Dublin.
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After the man rejects the glass both times, McGregor then pours a round for others in the venue.
The video cuts to a few minutes later with McGregor gesticulating with his arm.
It's unclear whether he and the man at the bar are exchanging words, but an agitated McGregor swings with his left hand, appearing to strike the man on the side of the face.
Incredibly, the victim doesn't seem particularly fazed, remaining seated as McGregor's entourage quickly usher the former UFC featherweight and lightweight champion away.
According to TMZ, Police are aware of the video and are still investigating but say no arrests have been made as yet.
The incident is just the latest in a long list of controversies surrounding the Dublin-born grappler.
McGregor escaped jail time in 2018 after throwing a dolly at the window of bus containing rival UFC fighters.
Later in the year, McGregor's loss to bitter rival Khabib Nurmagomedov descended into chaos after a mass brawl involving member's of both fighters' teams following match.
Both men were fined and banned following the Las Vegas incident.
Earlier this year, McGregor was involved in an altercation where he reportedly took a man's phone and smashed it on the ground, although criminal charges were eventually dropped.
Following the Nurmagomedov debacle last October, it is unclear when McGregor is expected to return to action in the UFC.