South Korea’s Joint Chiefs of Staff(JCS) said Thursday that North Korea launched about 180 trash-carrying balloons toward the South overnight in the seventh launch of its kind since last month. 

North Korea sent the latest batch of trash balloons starting from late Wednesday, the JCS said, with around 70 of them falling in northern Gyeonggi Province and Seoul. 

The balloons that were found carried mostly scraps of paper and waste, but no harmful materials, according to the JCS. However, it added that the balloons, each carrying a payload of about ten kilograms, could be dangerous if they fall quickly. 

The latest launch of trash balloons marks the seventh of its kind since May 28.

The South Korean military briefly resumed anti-Pyongyang broadcasts through loudspeakers on the border on June 9, following North Korea’s third balloon launch campaign, but has not carried them out since.

The JCS said the South Korean military is ready to launch loudspeaker psychological warfare operations at any time, warning that the implementation of the loudspeaker broadcasts depends on how the North will act.