Following an airing of BBC Panorama: Boxing and the Mob - an investigation into the role played by Daniel Kinahan, a person named in Irish court documents as the 'head of one of Europe's most prominent drug cartels' - the Panorama team behind the investigation come documentary have been threatened.

After the broadcast on Monday 1 February, Police Service Northern Ireland (PSNI) has warned of unspecified threats from unnamed criminal elements to the investigation.

The broadcast, which ended up leading a call for tighter regulation in the sport, discovered that Mr Kinahan was still active in advising boxers renowned worldwide.

Kinahan's involvement in the sport caused a massive outcry last summer when legendary world heavyweight champion Tyson Fury thanked him publicly for setting up the much-anticipated title fight with another renowned champion, Anthony Joshua.

After the outcry, criticism calmed after it was announced he [Kinahan] would no longer negotiate Tyson Fury's fights.

Speaking to the BBC regarding the threats, Jo Carr who is the BBC's head of current affairs said "The BBC places the utmost priority on the safety of our teams, whose journalism plays a vital role in a free society. It is despicable and intolerable if thugs think they can muzzle a free press through intimidation. We will continue to through light into even the murkiest of corners."

The crime group that Mr Kinahan is linked to is alleged to be involved in drug trafficking, execution-style murders, and is even suspected of being involved in a feud with a rival Dublin gang that resulted in 18 people being murdered.

The lawyer for Mr Kinahan told the programme that he had no criminal record of convictions and that the allegations about him being a crime boss are false.