South Korea sent out a government emergency disaster alert urging citizens to refrain from touching the objects and to report any more incidents to the military.
South Korea's defense ministry told NBC News that no human waste was found, but said that North Korea did send human waste via balloon in 2016.
According to the Yonhap news agency, this is the largest number of balloons from North Korea since similar incidents between 2016 and 2018.
"These acts by North Korea violate international law and threaten our people's safety," said South Korea's Joint Chiefs of Staff, urging North Korea to cease its "inhumane and vulgar behaviors" immediately.
In early May, North Korean defector-turned-human rights activist Park Sang-hak sent 20 balloons carrying 300,000 leaflets condemning North Korean leader Kim Jong Un.
Persons:
Park, hak, Kim Jong Un, Kim Jong, — Stella Kim, Michael Fiorentino
Organizations:
NBC News, South Korean, Chiefs of Staff, South, North
Locations:
North Korea, Cheorwon, South Korea, SEOUL, It's, Gyeonggi, Gangwon, South Gyeongsang, Korea, Pyongyang, North Korean, Seoul, London