British police say a "wealthy Russian businessman" has been arrested at his multimillion-dollar London home on potential money-laundering suspicions, and later released on bail.
The National Crime Agency did not identify the man in its December 3 statement.
But Russian state news agency TASS identified the man as Mikhail Fridman, a Russian-Ukrainian billionaire and one of the principals behind the Alfa Group conglomerate.
In its statement, the crime agency said a 58-year-old man was among three men who was arrested by officers from the Combating Kleptocracy Cell on December 1 at a "multimillion-pound residence" in London.
It was unclear why the agency released its statement two days after the arrest.
The man was detained on suspicion of money laundering, conspiracy to defraud the Home Office, and conspiracy to commit perjury, the agency said.
The agency also said a 35-year-old man was arrested at the premises after he was seen leaving with a bag containing a large amount of cash.
A former boyfriend, 39, of the businessman's partner was also arrested at the property, police said.
All three were released on bail.
The press service for Alfa Group issued a statement on December 3 stating Fridman was not under arrest. But the statement did not address whether Fridman had been released on bail.
TASS, citing what it described as a source close to Fridman, said Fridman had been detained, but then released on bail.
The Russian Embassy in London, meanwhile, issued a statement on December 3 demanding more information about the detentions.
Fridman, 58, was the founder of Alfa Bank, and grew to be one of Russia's wealthiest businessmen. He's been put under sanctions by the European Union as part of broader punishment against Russia for its war against Ukraine.
The EU described him as as "a top Russian financier and enabler of [President Vladimir] Putin's inner circle."
In 2013, Fridman and one of his main Alfa partners, Pyotr Aven, reorganized their holdings following the $14 billion sale of their stake in the Russian oil company TNK-BP, and created a new London-based investment group called LetterOne.
Both Fridman and Aven stepped down from LetterOne after the EU imposed sanctions in March.
In a statement to RFE/RL, LetterOne said it had no comment on the reports of Fridman's arrest.