With 20 of these balloons entering the South on Thursday, North Korea restarted its trash-filled balloon-throwing campaign against that country.

The Yonhap news agency said that the disclosure came from South Korea’s military.

The Joint Chiefs of Staff reported finding ten bundles of rubbish in the greater Seoul region. They said that propaganda pamphlets from the most recent launch were found in the garbage.

An investigation revealed no dangerous materials.

Kim Yo Jong, the sister of North Korea’s dictatorial leader Kim Jong Un, announced the most recent launch after Pyongyang allegedly found and deleted “political motivational rubbish” that was provided from South Korea on Tuesday.

In response to anti-North Korean propaganda leaflets delivered to the North by South Korean activists, Pyongyang began floating hundreds of balloons packed with rubbish in late May.

Such balloons were last launched on Saturday.

Since July, the South Korean military has been using loudspeakers along the border to broadcast anti-North Korean propaganda every day in response to the North’s balloons.

However, due to safety concerns, the military has decided not to fire down the balloons.