German journalists have discovered barrels of radioactive waste on the floor of the English Channel, just a handful of thousands dumped there decades ago. It was previously thought the material had dissipated. Now politicians are calling for the removal of the potentially harmful containers.

Some 28,500 containers of radioactive waste were dropped into the English Channel between 1950 and 1963. Experts have assumed that the containers had long since rusted open, spreading the radioactivity throughout the ocean and thus rendering it innocuous. But a new investigative report from the joint French-German public broadcaster ARTE has concluded that the waste is still intact at the bottom of the sea.

As part of an investigative report set to air on April 23, affiliated German public broadcaster SWR sent an unmanned, remote-controlled submarine into the canal’s depths, where they discovered two nuclear waste barrels at a depth of 124 meters (406 feet)…