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Russian soldiers have seized the Ukrainian corvette Khmelnitsky.
About 20 armed soldiers disembarked from the long boat that was blocking the ship in Sevastopol Bay on the evening of March 20.
The European Union has cancelled the EU-Russia summit appointed for June 3. The EU member states have refused from bilateral summits with Russia.
Ukraine's security service SBU busts two diversion groups that had secret addresses, weapons and money.
Barack Obama has excluded the interference of the USA into the Ukrainian crisis, he told NBC.
Ukraine's National Security and Defense Council orders the country's security services and the army to put troops on high alert.
Ukrainian soldiers have prevented strangers from entering the territory of the military units Belbek aerodrome near Sevastopol.
Admiral Sergei Gaiduk is released along with other hostages that were detained yesterday by public prosecutor's office in Sevastopol.
Ukraine's National Security and Defense Council moves to introduce visas for Russian citizens.
