The Russian oligarch, Oleg Deripaska, 52, has faced economic sanctions since 2018, when he was designated for them by the U.S. Treasury Department.

Joe Biden last week warned that US$6.5 billion earmarked for security assistance for Ukraine could soon be “exhausted” and that Congress would need to approve supplemental funding.

Britain has detained a Russian-owned $50 million superyacht hours before it was due to leave London where it had docked for a meeting of the superyacht awards.