Al Jazeera's Tim Friend reporting from Kiev says two oligarchs have been appointed as regional governors in the East by the new administration in Ukraine as the leadership grapples with pro-Russian sympathy.
Italy appealed to Russia not to launch a "totally unacceptable" invasion of Ukraine and said it was extremely worried by recent events in Crimea.
"The Italian government supports the pressing requests of the international community for Ukraine's sovereignty and territorial integrity to be respected," Prime Minister Matteo Renzi's office said in a statement.
"Any violation of these principles would be totally unacceptable for Italy," it added.
NATO Secretary General Anders Fogh Rasmussen is speaking live to reporters from Belgium.
Rasmussen: NATO allies will continue to support Ukraine's territorial sovereignty
Rasmussen: We stand by Ukraine as a partner, and urge both partners to seek a peaceful resolution.
Rasmussen: NATO expresses great concern over Russian parliament's use of force against Ukraine.
Ukrainian representative to NATO Ihor Dolhov is speaking to reporters.
Dolhov: We have received a lot of support.
Dolhov: This is the beginning of developing additional measures to seek a peaceful resolution.