South Korea Says Parasites Detected in Trash-Filled Balloons from North Korea

 Parasites have been detected in some of the trash-filled balloons sent by North Korea to South Korea, but no harmful substances were found, Seoul's unification ministry said Monday.

In recent weeks, North Korea has sent more than 1,000 trash-carrying balloons toward the South on multiple occasions in retaliation for South Korean activists' leaflet campaigns condemning North Korea.

"Numerous parasites, such as roundworms, whipworms and threadworms, were found in the soil contained in the trash," the ministry said in a press release, adding that the parasites are believed to originate from human excrement.