US ambassador highlights 'disturbing day in Ukraine'

US ambassador to the UN Samantha Power wrote on Twitter:


Disturbing day in #Ukraine, starting with reports that—in addition to SE Serry's harassment on Wed—the @osce team was blocked from #Crimea.


The proposed referendum on the future of #Crimea would violate the Ukranian constitution. The U.S. will not recognize its results.

Read: International community condemns Crimean vote to join Russia


Russian troops 'opened fire during military post takeover'

Russian troops opened fire during a takeover of a Ukrainian military post in Crimea but no one was injured, news agency Interfax reports.