Moscow/Kyiv, Nov. 10 -- Russia and Ukraine have privately demonstrated "a little bit of flexibility" over disputed territory, according to a senior US official, as a new round of negotiations aimed at ending Moscow's war against Kyiv began in Abu Dhabi on Tuesday.

The comments came after US President Donald Trump suggested that Ukraine could emerge from the conflict with "a little bit different shape", without specifying what territorial changes might be involved.

Moscow has demanded that Kyiv recognise Russian control over Crimea and the four regions it claims to have annexed - Donetsk, Lugansk, Zaporizhzhia and Kherson - and withdraw its forces from all four, including areas not controlled by Russian troops. Ukraine has repeatedly rejec...