Senior Russian parliamentarians urged Ukraine to sack its foreign minister for calling President Vladimir Putin a "dickhead" during a violent protest outside Russia’s embassy in Kiev.

Russia has demanded more autonomy for Ukraine’s regions as the pressured nation ordered its troops out of Crimea.

US President Barack Obama and Western allies moved to indefinitely cut Moscow out of a major international coalition today, including cancelling an economic summit Russian President Vladimir Putin was to host this summer.

US and Western diplomats yesterday failed to bring Russian and Ukrainian foreign ministers together for face-to-face talks on the confrontation in Crimea.