The cause of his death is not yet clear. She added that police removed several bags of evidence.
A tribute to Glushkov was posted on Facebook by his friend, the newspaper editor Damian Kudryavtsev.
There is no evidence linking his death to the poisoning of ex-spy Sergei Skripal, who remains in a critical condition alongside his daughter after the pair were slipped a suspected nerve agent.
British PM Theresa May says it's "highly likely" Russian Federation is behind the poisoning, and has given the country a deadline of Tuesday (UKT) to explain.
The businessman was reportedly found in his London home with the cause of death not yet clear.
News of Glushkov's death comes amid heightened tensions between the London and Moscow over the recent poisoning of a former Russian agent and his daughter.
Police in London said they believed they knew the identity of the deceased man but that the body had not yet been formally identified. "If there is a change in the status of the investigation, an update will be provided", the Met said.
CRPF DG rushed to Sukma
Following the attack, officials said huge contingents of paramilitary and police were rushed to the spot to take on Naxals. More forces have reached the spot and the Director-General CRPF, Rajeev Rai Bhatnagar, is on his way to Chhattisgarh.
After the death of Mr Berezovsky, Mr Glushkov told the Guardian he was not convinced the police investigation into the death - which found Mr Berezovsky had committed suicide - was accurate.
Britain granted Berezovsky political asylum three years later on the grounds his life would be in danger if he went back home.
Glushkov held a top position with Russia's state airline Aeroflot and worked under Berezovsky in the nineties.
He said the tycoon's former wife noticed marks on his neck minutes after he was found dead, adding: 'A scarf was there. His death was not treated as suspicious, but his friends were not convinced and a coroner later recorded an open verdict.
He said: "I'm definite Boris was killed". Natasha is believed to live in the UK.
In 2017, a Moscow court reviewing his case sentenced him in absentia to eight years and Russia's London embassy put him on a list of those wanted for serious crimes whom Britain had refused to extradite.