Police in Jersey have searched properties suspected to be connected to Roman Abramovich's business activities.
The billionaire is one of a number of prominent Russian oligarchs to have sanctions imposed on them as a result of the invasion of Ukraine.
In addition to the search warrants, $7 billion worth of assets believed to be linked to Mr Abramovich was seized by Jersey's Royal Court on Tuesday 12 April.
These assets are either in Jersey or owned by Jersey-incorporated entities, such as companies registered in the island.
In court terms, this is known as a "saisie judiciaire."
The business magazine Forbes estimated Abramovich's worth to be $14.5 billion in 2021.
Roman Abramovich made his money during the opening up of the former Soviet Union in the 1990s, when large state assets were sold to private individuals.
He has owned Chelsea Football Club for some years, but last month put it up for sale, because of the sanctions imposed on him.

Work begins on Haut du Mont Memorial Garden
Inflation in Jersey at 2.8%
Review rules out benefits overlap for pensioner carers
Ignoring data protection may cause Jersey to 'lose our economy'
Draft law scraps time limits on abortions in Jersey
Divide over approach to gender guidance in schools
Three charities awarded £500 grants in community campaign
Ministers back principle of social media 'restrictions' for under 16s