Sulfur from two ships that sank in a storm near the Black Sea last week is leaking into waters already polluted by an oil spill from another vessel, UkraIne's Environment Ministry said on Monday.
Four ships sank in the Kerch Strait on the northern mouth of the Black Sea in one of the worst storms in a century. They included a Russian-registered tanker which disgorged hundreds of tons of oil, creating a environmental disaster for the area's ecology.
Tens of thousands of birds, covered in heavy fuel oil and unable to fly, have been killed mostly on Russia's side of the strait. The pollution has also killed fish and even dolphins, according to environmental agencies.
Two other Russian ships were carrying several thousand tons of sulfur.