Moscow: Russian President Vladimir Putin said Moscow reserves the right to use all means to protect Russians in Ukraine as U.S. Secretary of State John Kerry was on his way to Kiev.
Tensions remained high in the strategic Ukrainian peninsula of Crimea with troops loyal to Moscow firing warning shots to ward off protesting Ukrainian soldiers.
In his first comments since Ukraine President Viktor Yanukovych fled Kiev, Putin said he considers him to still be Ukraine's leader, and hopes that Russia won't need to use force in predominantly Russian-speaking eastern Ukraine.
He rejected the Western threat to punish Russia with sanctions over its action in Ukraine, saying they will backfire against the West.
Earlier Tuesday, the Kremlin said Putin had ordered tens of thousands of Russian troops participating in military exercises near Ukraine's border to return to their bases.
The massive military exercise in western Russia involving 150,000 troops, hundreds of tanks and dozens of aircraft was supposed to wrap up anyway, so it was not clear if Putin's move was an attempt to heed the West's call to de-escalate the crisis that has put Ukraine's future on the line.