Pro-Russian separatists 'will not postpone referendum'

Pro-Russian separatists say they will not postpone a referendum on independence planned for Sunday, Russia's Interfax news agency has reported.

More: Putin calls for delay to Ukraine separatist referendum

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Cameron offers more Typhoons for Nato air mission

Britain will offer another two Typhoon warplanes to patrol the skies of eastern Europe amid continuing tensions with Russia over the Ukraine cris, David Cameron has said.