South Korea announced it will restart propaganda broadcasts aimed at North Korea for the first time in six years, responding to Pyongyang’s recent campaign of sending balloons filled with rubbish across the border. Over the weekend, more than 300 North Korean balloons were detected, with around 80 landing in South Korea, carrying scrap paper and plastic sheets.

While North Korea has not yet responded to the announcement, it has historically viewed the loudspeaker propaganda broadcasts as an act of war and previously threatened to destroy the speakers. Last month, North Korea appeared to send at least 200 balloons carrying rubbish over the border in retaliation for propaganda leaflets sent from the South.

Over the weekend, North Korea resumed its waste campaign against South Korea by sending balloons carrying sacks of rubbish over the border. This action was in retaliation for South Korean activists sending 10 balloons with leaflets critical of the North Korean regime on Friday, according to the AFP news agency.

South Korea’s military confirmed that there are no more balloons in the air and no hazardous materials have been found. The military has advised the public not to touch the balloons and to be cautious of falling objects. They urged people to report any sightings to the nearest police or military unit.