South Korean activists float huge balloons carrying anti-Pyongyang leaflets and cash over the border to North Korea on Monday.
A group of about 20 activists managed to release seven balloons holding 50,000 leaflets denouncing leader Kim Jong-un, despite efforts by local residents to block the launch.
The local residents fear reprisals from their northern neighbour after Pyongyang threatened a "merciless military attack" if the leaflets continued.
(SOUNDBITE) (Korean) LOCAL SHOP OWNER, 56-YEAR-OLD KIM BOK-NAM, SAYING:
"Paju residents can't live properly due to worries. They come here way too frequently. Last time, the North threatened to directly strike here, so we came to protest since we can't tolerate it anymore."
South Korea said it would retaliate against any North Korean attack, but banned activists from sending the propaganda leaflets across the border last week.
Defectors and anti-North Korean activists have frequently launched balloons carrying propaganda and cash across the border.
But the warning of a "merciless military strike" was the most explicit in months and the first since Kim Jong-un took power in December 2011.
