The UK authorities are imposing sanctions on Roman Abramovich, Oleg Deripaska and five other Russian businessmen, according to a statement from Downing Street.

A statement published on the British government website announced "a full asset freeze and travel ban."

The sanctions have also been imposed on Rosneft CEO Igor Sechin, VTB Chairman Andrei Kostin, Transneft President Nikolai Tokarev, Gazprom CEO Alexei Miller, and businessman Dmitry Lebedev.