"If Russia continues to interfere in Ukraine, we stand ready to impose further sanctions," Obama said in a statement from the White House.
Earlier Monday, the White House announced a series of sanctions targeting individuals involved in the crisis, including aides to Russian President Vladimir Putin and the ousted former president of Ukraine, Viktor Yanukovych.
"We are making it clear that there are consequences for their actions," Obama said.
The president said he will travel to Europe next week for meetings with allies.
"We will continue to make clear to Russia that further provocations will achieve nothing except to further isolate Russia and diminish its place in the world," Obama added.
Read more: http://www.nbcnews.com/storyline/ukraine-crisis/obama-warns-russia-more-provocations-mean-more-sanctions-n54616
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