Police issued a harassment warning to Willie McKay following a complaint that he threatened to “burn” Cardiff City and to “kill everybody” there, Telegraph Sport can reveal.

The man who booked Emiliano Sala’s flight was interviewed under caution by the Metropolitan Police after being accused of making threats to Cardiff chairman Mehmet Dalman, chief executive Ken Choo, player liaison officer Callum Davies and one other man.

As revealed by The Telegraph, the Met launched an investigation after McKay, who turned 60 this month, found out where one of his alleged victims lived and confronted him at a nearby café before committing what the force described as a “possible public order offence”.

The Met said the incident was not being treated as “threats to kill” amid claims the Scot subjected the same man later that day to threatening phone calls in which he said, “I’ll shoot the lot of you”, and, “You don’t know who you’re dealing with”.

Confirming its investigation into the Feb 22 altercation had “now concluded”, the Met said: “A man, aged in his fifties, was interviewed under caution on Tuesday, May 28. He was not arrested. The man was issued with a first instance harassment warning.”