US Secretary of State Marco Rubio has insisted that a proposed plan to end the Ukraine war, which has been widely viewed as favourable to Russia, was "authored by the US". It comes after a group of senators said they had been told by Rubio that the draft - which one said he described as a Russian "wish list" - did not reflect Washington's position. Rubio later distanced himself from those claims and said the plan came from the US, and was "based on input" from both Russia and Ukraine.