"trash-balloons"

Raises worries about security of key Seoul facilities

This comes two days after the South restarted blaring anti-Pyongyang propaganda broadcasts across the border

Comes after Kim Jong Un's influential sister, Kim Yo Jong warned Seoul to halt propaganda broadcasts across their tense border

Statement by Kim Yo-jong came after the South resumed propaganda loudspeaker broadcasts toward the North for the first time in six years

Move is certain to anger North Korea, potentially prompt it to take retaliatory military steps