U.S. Secretary of State John Kerry accused Russia of seeking to change the security landscape of eastern and central Europe at a think tank in Washington, Anadolu Agency reports.

Speaking at the Atlantic Council think tank, John Kerry said “What Russia's actions in Ukraine tell us is that today Putin's Russia is playing by a different set of rules".

Kerry added that Moscow is pursuing a “complete fiction” through its actions in Ukraine, and that the ongoing crisis is a “wakeup call” for America and its European allies.

America’s top diplomat called on NATO allies to increase defense spending to form a stronger alliance; members states are currently committed to spend at least two percent of their GDP on defense. 

In a joint statement released Saturday, the G7 agreed to impose further economic sanctions on Moscow and condemned Russia’s lack of support for the Geneva accord on April 17 aimed at defusing the crisis.

The United States imposed new sanctions on Russia, designating seven new Russian government officials and 17 companies linked to Russian President Vladimir Putin’s inner circle.