US, Russia remain deeply at odds over Ukraine crisis after Kerry-Lavrov talks in Paris

U.S. Secretary of State John Kerry, left, shakes hands with Russian Foreign Minister Sergey Lavrov before the start of their meeting at the Russian Ambassador's residence about the situation in Ukraine, in Paris Sunday March 30, 2014. Kerry traveled to Paris for a last minute meeting with Lavrov. (AP Photo/Jacquelyn Martin, Pool) (The Associated Press)

U.S. Secretary of State John Kerry, left, is greeted by Russian Foreign Minister Sergey Lavrov at the Russian Ambassador's residence for a meeting to discuss Ukraine, in Paris, Sunday March 30, 2014. Kerry traveled to Paris for the last minute meeting with Lavrov. (AP Photo/Jacquelyn Martin, Pool) (The Associated Press)

U.S. Secretary of State John Kerry arrives in Paris, on Saturday March 29, 2014. After leaving Saudi Arabia the secretary canceled a return to Washington in order to travel to Paris for a meeting with Russian Foreign Minister Sergey Lavrov about the situation in Ukraine. The meeting was arranged during a refueling stop in Ireland en route to Paris. (AP Photo/Jacquelyn Martin, Pool) (The Associated Press)

The U.S. and Russia are advancing far different proposals on how to calm tensions and de-escalate the crisis in Ukraine as Russia continues to mass troops along its border with the former Soviet republic.

U.S. Secretary of State John Kerry Sunday called for Moscow to begin an immediate pullback of the troops. He also ruled out discussion of Russia's demand for Ukraine to become a loose federation until and unless Ukrainians are at the table.

While the United States and Russia agreed that the crisis in Ukraine requires a diplomatic resolution, four hours of talks Sunday between Kerry and Russian Foreign Minister Sergey Lavrov failed to break a tense East-West deadlock over how to proceed.