Ukraine crisis: Obama urges caution over Geneva deal
18 April 2014 Last updated at 09:35 BST
US President Barack Obama has cautiously welcomed a deal to calm tensions in Ukraine, reached at multi-party talks in Geneva.
He said the US and its allies were ready to impose new sanctions on Russia if the situation failed to improve.
Speaking in Washington on Thursday, he said he hoped President Putin would "follow through" on pledges made to de-escalate the crisis in Ukraine.