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 Russian oil tanker carrying thousands of tonnes of oil products split apart during a heavy storm on Sunday, spilling oil into the Kerch Strait, while another tanker was also in distress after sustaining damage,

Two oil tankers carrying nearly 9,000 metric tons of mazut fuel were damaged by a storm, broke in half, sunk and caused oil spills in Kerch Strait, which separates Crimea and Russia.