Marco Rubio says Washington will be "realistic" on Russia-Ukraine talks

US Secretary of State Marco Rubio says American efforts on Russia-Ukraine talks will be determined by whether both sides have any viable and 'realistic' proposals from the discussions held in Turkey earlier.

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Speaking to CBS News, Rubio, responding to a query on whether both sides were 'tapping' the US around, said "Well, that's what we're trying to find out. We'll find out pretty soon. They met last yesterday or the day before in Turkey. From that they agreed they're going to exchange paper on ideas that get to a cease-fire.

"If those papers have ideas on them that are realistic and rational, then I think we know we've made progress. If those papers, on the other hand, have requirements in them that we know are unrealistic, then we'll have a different assessment."

The Secretary of State said that Washington does not want to get bogged down in endless talks with no results, as there is a lot going around in the world today which required the US' attention.