The president of US Barack Obama, accused Vladimir Putin of breaking international law as he seeking to blame the Americans for the growing international standoff.
As Putin made his first public remarks on the crisis of ruling out a war days after his forces took control of the Ukrainian peninsula of Crimea, but reserving the right to use force to protect Russian speakers in the east of the country increase tensions between both the countries.
Obama and US secretary John Kerry, responded after Putin maintained there were no Russian forces occupying Crimea. John Kerry arrived Kiev and offered $1bn in loan guarantees to the new Ukraine government.
In Crimea tensions remained high with Russian forces firing warning shots at unarmed Ukrainian soldiers marching on an airfield.
The Americans are pushing for economic sanctions against the Kremlin elite and an EU emergency summit in Brussels is likely to decide on sanctions unless the Russians de-escalate.
The language employed by Putin will be taken as reduce the intensity and pressure for punitive action against Russia global markets rose in response to tentative signals that the Kremlin was not seeking to rapidly increase the conflict.
Arseniy Yatseniuk, the acting Ukrainian prime minister, said his government was in touch with Russian ministers with a view to holding consultations. There were also signs of new negotiations on the crisis.