Ukraine is not willing to compromise on its territorial integrity in talks with Russia but is open to discussing "non- NATO models" for its future, in a wider forum, one of its negotiators told Fox News.

"The response that we are getting from the NATO countries is that they are not ready to even discuss having us in NATO, not for the next period of five or 10 years," negotiator David Arakhamia said in remarks published on the Fox News website late on Saturday.