South Korea says tiny amounts of a toxic element found in Agent Orange have been discovered in three streams near a U.S. military base. But Seoul says the amount of dioxin is too small to cause health problems.
The Environment Ministry said Thursday that the finding is a preliminary result of a joint investigation with the United States that began last month.
U.S. veterans claim they buried Agent Orange at Camp Carroll in southern South Korea in the 1970s.
Environment Ministry officials say it's unclear if the dioxin is related to the alleged burial.
Land and water inside the U.S. base are also part of an investigation scheduled to continue until next month.
There are 28,500 U.S. troops in South Korea.