North Korea resumed flying balloons on Saturday in a likely attempt to drop trash on South Korea again, South Korea’s military said, two days after Seoul activists floated their own balloons to scatter propaganda leaflets in the North, Paralel.Az reports citing AP.

Animosities between the two Koreas have risen recently because North Korea launched hundreds of balloons carrying manure and trash toward South Korea in protest of previous South Korean civilian leafletting campaigns. In response, South Korea suspended a tension-easing agreement with North Korea to restore front-line military activities.

Saturday’s balloon launches by North Korea were the third of their kind since May 28. It wasn’t immediately known if any of of the North Korean balloons had landed on South Korean territory across the rivals’ tense border.