This is the best summary I could come up with:

The recent incident comes days after North Korea said it would retaliate against the “frequent scattering of leaflets and other rubbish” in border areas by activists in the South.

“Mounds of wastepaper and filth will soon be scattered over the border areas and the interior of the ROK and it will directly experience how much effort is required to remove them,” North Korea’s vice-minister of defence Kim Kang Il said in a statement to state media on Sunday.Republic of Korea or ROK is the official name of South Korea while the North is called DPRK or the Democratic People’s Republic of Korea.Late on Tuesday, residents living north of the South’s capital Seoul and in the border region received text messages from their provincial authorities asking them to “refrain from outdoor activities”.They were also asked to file a report at the nearest military base or police station if they spot an “unidentified object”.

Photographs shared on social media show bags attached via string to white translucent balloons carrying toilet paper, dark soil, and batteries, among other contents.

South Korea’s Yonhap news agency reported that “some of the fallen balloons carried what appears to be faeces judging from its dark colour and odour”.South Korea’s military condemned the act as a “clear violation of international law”.

North Korea is entirely liable for what happens due to the balloons and we sternly warn North Korea to immediately stop this inhumane and crass action," the military said.In addition to anti-Pyongyang propaganda, activists in South Korea have launched balloons carrying among other things, cash, banned media content, and even Choco Pies - a South Korean snack banned in the North.Earlier this month, a South Korea-based activist group claimed it had sent 20 balloons carrying anti-Pyongyang leaflets and USB sticks containing Korean pop music and music videos across the border.Seoul’s parliament passed a law in December 2020 that criminalises the launch of anti-Pyongyang leaflets, but critics have raised concerns related to freedom of speech and human rights.North Korea has also launched balloons southward that attacked Seoul’s leaders.

In one such launch 2016, the balloons reportedly carried toilet paper, cigarette butts and rubbish.

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