SEOUL, May 10 (Xinhua) -- The South Korean defense ministry said on Monday that it has confirmed the detection of an explosive chemical substance RDX, commonly used in producing torpedoes, from the stack of sunken naval warship "Cheonan" as well as sand collected from the seabed of the explosion site.
"It is true that traces of RDX, an explosive used in the production of torpedoes, have been detected," the ministry said in a statement.
However, the ministry said that RDX, which stands for research department explosive, is not a substance used exclusively in the West, as was reported by various press agencies, adding that it is commonly used worldwide within the military and industrial sectors of all nations.
"RDX is an explosive that has been used since World War II by many countries, including the defunct Soviet Union and other socialist nations," it said.
Some media reports indicated the explosive chemical substance is used only in Western nations, raising speculation that the traces found in the sunken ship might have come from South Korean weapons used in drills near the area.