UK imposes sanctions on Chelsea owner Abramovich

The UK government has imposed sanctions on Chelsea football club's owner, Roman Abramovich.

The Russian billionaire is one of seven Russian oligarchs whose assets have been frozen.

In a UK Treasury document posted online, Abramovich is described as a "pro-Kremlin oligarch" who has close associations to Russian President Vladimir Putin.

Abramovich has previously denied having close financial ties with Putin or the Kremlin.