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.

Two Russian tankers that spilled oil into the Kerch Strait after sustaining serious damage during a heavy storm on Sunday were carrying 9,200 metric tons (62,000 barrels) of oil products at the time,