Communication channels between Washington and the Kremlin remain open, it has been confirmed.
Speaking at an event in New York, US National Security Adviser Jake Sullivan, said it was in the "interests" of the US to remain in contact with Moscow, but officials are "clear eyed with who we are dealing with", the BBC reports.
It comes as the White House refuses to deny reports that Mr Sullivan had been in talks with Russia to stop any potential plans for nuclear weapons to be used in Ukraine.
