Donald Trump's Ukraine envoy has resigned after being named in a whistleblower complaint which sparked an impeachment inquiry into the president.
Kurt Volker told US Secretary of State Mike Pompeo on Friday of his decision to leave the job, according to a US official who spoke to the Associated Press on condition of anonymity.
The move comes after it emerged that Mr Volker had connected the US president's personal lawyer Rudy Giuliani with Ukrainian officials to investigate Joe Biden and his family over allegedly corrupt business dealings.