Russia's state media say an estimated 3,700 tons of low-grade fuel oil has spilled into the Kerch Strait after two Russian ships were seriously damaged by stormy weather.

A heavy storm Sunday damaged two Russian tankers carrying thousands of barrels of oil and caused an unknown amount to spill into the sea, according to reports from Reuters.

On Sunday, two Russian tankers in the Kerch Strait on the Black Sea caused a disaster, leaking several thousand tons of heavy fuel oil into the water. Greenpeace is sounding the alarm: "Russia's militarization of the Black and Azov Seas has led to another ecological disaster,