A SOUTH KOREAN activist group clashed with police on Saturday while launching balloons carrying anti-Pyongyang propaganda materials across the North Korean border, ignoring their government’s plea to stop such activities.

Park Sang Hak, a North Korean defector-turned-activist, said his group had launched about eight balloons from an area in the South Korean border town of Paju on Saturday night when police officers arrived.

Mr Park said police confiscated some of their materials and detained him and three others over scuffles with officers before releasing them after questioning.