Willie McKay threatened to “burn” Cardiff City and warned “I’ll shoot the lot of you”, according to a complaint that is now being investigated by the Metropolitan Police.

The Sunday Telegraph can reveal more of the threats Cardiff claim were made to – among others – senior club officials by the man who booked Emiliano Sala’s doomed flight.

Three weeks after this newspaper disclosed police were investigating accusations McKay threatened to “kill everybody” at the Premier League side, it has also emerged he found out where one of the persons to whom threats were allegedly made lived before confronting him at a nearby cafe.

As revealed by The Telegraph, the Met launched an investigation into “a possible public order offence” close to one of his alleged threatened person’s London homes.

The police said the alleged incident a month ago is “not being treated as “threats to kill” and that no arrests have been made “at this time”.

The Met confirmed it had launched an investigation 2½ weeks after South Wales Police said it had opened its own inquiry into a complaint by Cardiff about the man who also helped broker Sala’s tragic transfer from Nantes.

View more!

That complaint included an accusation that he warned, “I’ll burn Cardiff”, during an angry phone call with a club official three weeks after Sala died in a plane crash in the English Channel.

It also claimed the alleged victim McKay confronted in person a month ago was subjected later that day to threatening calls in which the Scot said, “I’ll shoot the lot of you”, and, “You don’t know who you’re dealing with”.

The Telegraph previously revealed that McKay had been accused of saying, “I’ll kill everybody if my sons get slaughtered”, on the same weekend as Sala’s funeral in Argentina last month. McKay’s eldest son, Mark, was one of the agents involved in Sala’s transfer from Nantes to Cardiff, while another of his sons, Jack, helped arrange the player’s doomed trip.

It can now be disclosed the threat to “kill everybody” was allegedly issued to Cardiff chief executive Ken Choo and player-liaison officer Callum Davies in American Airlines’s business lounge at Buenos Aires Airport.

As of last week, police had yet to interview McKay.

Having repeatedly ignored questions from this newspaper about his alleged threats to Cardiff officials, he granted an interview to L’Equipe yesterday in which he declined to comment on the Met investigation.

He did admit to an altercation with Choo at Buenos Aires Airport, comparing it to “a football match when two managers have an argument on the touchline”.

But he denied threatening to kill everybody at the club and questioned why Cardiff had waited a fortnight to involve the police if they believed he had done so.

Cardiff declined to comment.