Russian billionaire and Chelsea owner Roman Abramovich | Paul Gilham/Getty Images UK has not given new visa to Roman Abramovich Oligarch’s visa ran out several weeks ago and he does not yet have a new one.

British authorities have not yet given a new visa to Roman Abramovich, the Russian oligarch and owner of Chelsea Football Club, allowing him to stay in the U.K.

Abramovich held an entrepreneurial visa that expired several weeks ago. He has applied for a new one, but it has not yet been granted, the Financial Times reported.

The delay was first reported by Russian news agency The Bell, which wrote Sunday that Abramovich’s visa had expired three weeks ago and that his private jet last travelled to London on April 1.

The 13th richest person in Britain (according to the Sunday Times) did not attend Chelsea's 1-0 win over Manchester United in the FA Cup final on Saturday. He also failed to testify last week in a London court dispute between two other Russian oligarchs, Oleg Deripaska and Vladimir Potanin.

“There’s something up with his visa. I don’t know what it is and they don’t know what it is either. Let’s hope they sort it out soon,” a fellow Russian oligarch was reported by the FT as saying.

A spokesman for Abramovich declined to comment, as did the Home Office. “We do not routinely comment on individual cases,” said Security Minister Ben Wallace.

Since the poisoning of a Russian former spy and his daughter in Salisbury in March, the British government has come under pressure to target “regime-linked money.”

Ken Macdonald, a former director of public prosecutions, told the Telegraph a “really aggressive financial strategy” against wealthy individuals associated with Russian President Vladimir Putin would be Britain’s most effective weapon.

In March, then British Home Secretary Amber Rudd asked officials to review the basis on which more than 700 wealthy Russians were allowed to settle in the U.K.