Environment Minister Didace Pembe declined to identify the person who was arrested because investigations were ongoing. He said the waste belonged to a Chinese company called Magma-Lubumbashi, but that the company had not requested the waste be dumped in the Likasi River.
The mining minister for Congo's Katanga province announced on a U.N.-backed radio station that 17 tons of "highly radioactive" minerals had been found in the river on Monday. He did not provide further details and could not be reached for comment.
Authorities have issued calls over local radio stations asking people to avoid using the river to drink or bathe, Pembe said.
The Likasi River runs through a town of the same name and is not far from the village of Shinkolobwe, which provided the uranium used by the United States in the atomic bombs it dropped on Japan at the end of World War II.
Although the main mine shaft at Shinkolobwe was filled with concrete and closed in 1960 by Belgian authorities, uranium is still found in the area and thousands of local diggers have continued working in Shinkolobwe despite a presidential decree again ordering it shut several years ago.
Experts from the International Atomic Energy Agency have played down the dangers of the uranium at Shinkolobwe, saying that enriching the relatively small amounts of uranium found in the surrounding soil at the site to weapons-grade material would be a long and extraordinarily sophisticated process.
The discovery of the submarine has unveiled a few "inconsistencies." For example, how can one explain the fact that the sub was found where it needed to be searched for from the start?
When on a state visit to Singapore, Russian President Vladimir Putin promised to revisit the discussion of the 1956 Declaration between the USSR and Japan regarding the issue of the peace treaty with Japan
The TurkStream, which runs along the bottom of the Black Sea from Russia's Anapa to Turkey, will consist of two lines, each with a capacity of 15.75 billion cubic meters of gas a year