An England fan died in Bulgarian police custody amid allegations from officers that he had been behaving "aggressively, raging and threatening" in hospital ahead of the Euro 2020 qualifier.

The 32-year-old had apparently been taken in for treatment after being discovered "helpless" by officers who found him in a Sofia park at 10am on Monday.

A local police spokeswoman told the Daily Telegraph she "cannot confirm" local reports that the man may have taken drugs. "He was found in a helpless condition," she said.

On Monday night the Foreign Office said it was liaising with with the dead man's family in the UK. British police counterparts were also working with Bulgarian officers to establish the exact cause of death.

According to local officers, the man was immediately taken to hospital from Borisova Gardens. The Bulgarian Ministry of Interior later released a statement to "clarify the facts and circumstances surrounding the incident that took place in the capital".