Crime Journalist Paul Williams says Police are set to inform the UFC star his life is in danger.

Irish news outlets are reporting McGregor allegedly brawled with three men in an Irish pub, one of which is allegedly the father of the gang's crime lieutenant, Graham “The Wig” Whelan.

Whelan, the head of the Kinahan cartel, is one of Ireland's most feared crime figures with reports stating he now wants retribution of $1.4 million.

Williams said the threat to McGregor’s life is real.

“I have to say about this, and I’m wearing my old, veteran crime reporter hat: Conor McGregor is in a very dangerous place at the moment,” Williams said on Newstalk Breakfast, a radio show he co-hosts.

“He has come into conflict through probably no fault of his own, with a group of very, very dangerous people who are tied up with the Kinahans. These people do not care who Conor McGregor is, what he stands for, how powerful he is, they will drag him down into the cesspit.

“I would say, in the next 48 hours, if he is still in the country - and I understand that he may have left the country - but if he is still in the country, I understand from my sources that the Garda will be approaching him to give him a GIM form, which is a Garda Information Message, to tell him that there may be threats to his safety. This is a huge story, and imagine what it would do to our reputation if this national sporting icon is attacked by a bunch of gangsters.”

Williams again stated McGregor’s potentially dire situation.

“I just want to make a comment about this. Conor McGregor is potentially in very, very serious danger, I hear that from my sources and from looking at the lay of the land,” Williams said.

“He has ended up crossing swords - accidentally or however - with some very, very heavy people, or some people who are related to some very, very heavy people who could pose a very serious threat to his safety, and potentially his life. And I don’t say that lightly.

“And these people, you have to remember – as I keep saying – they don’t care, they don’t have parameters, they don’t have boundaries, they don’t discriminate between whether you’re an international sporting icon or just a man on the street. They shoot you, they injure you, they do whatever they want to do.

“I think it’s extraordinary. And I think in the next 24-48 hours, I believe that An Garda Síochána will be approaching Conor McGregor and saying to him, ‘By the way, we just want to officially inform you that potentially your safety is at risk’.

“I think it’s an extraordinary state of affairs. And watch this space.”