US: Russian intervention in Ukraine 'a grave mistake'

US Secretary of State John Kerry Credit: Reuters

The United States has warned Russia that it would be a "grave mistake" to embark on military intervention in Ukraine.

"I don't think there should be any doubt whatsoever that any kind of military intervention that would violate the sovereign territorial integrity of Ukraine would be a huge - a grave mistake," US Secretary of State John Kerry said.

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US warns against Russian military intervention in Ukraine

The United States has warned Russia that it would be a "grave mistake" to embark on military intervention in Ukraine.