REPUBLIKA.CO.ID, WASHINGTON -- President Barack Obama warned Wednesday that Russian "might is not right" but ruled out any US military action in Ukraine.

Obama said in an interview with California NBC television outlet KNSD that Russia had violated another country's sovereignty by marching into the Ukrainian region of Crimea.

But he reiterated that "we are not going to be getting into a military excursion in Ukraine."

"What we are going to do is mobilize all of our diplomatic resources to make sure that we've got a strong international coalition that sends a clear message," Obama said.

"Might doesn't make right. We are going to continue to ratchet up the pressure on Russia as it continues down its current course."

But Obama cautioned that "even the Ukrainians would acknowledge that for us to engage Russia militarily would not be appropriate and wouldn't be good for Ukraine either."

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