NOVO-OGARYOVO, Russia - Russian President Vladimir Putin said on Tuesday Russia reserved the right to use all options if there is lawlessness in eastern Ukraine.

The Russian leader said there had been an "unconstitutional coup" in Ukraine and ousted leader Viktor Yanukovich was still the legitimate leader of the country despite giving up all power.

The former KGB spy also told reporters there was no need to use force in Ukraine's southern Crimea region at the moment, but Russia reserved the right to do so as a "last resort".

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