PANMUNJOM, Korea (AP) — As North Koreans cheered and waved white “unified Korea” flags, a South Korean activist was arrested as soon as he set foot on home soil Thursday, resisting police in a stunt of defiance after an unapproved, three-month stay in the North.

Turning around to face crowds of cheering North Koreans before stepping over the line, No Su-hui raised his arms and shouted “Long live reunification,” a white unified Korea flag in his right hand and a bouquet of flowers in his left. Behind him on the South Korean side, South Korean soldiers stood in taekwondo poses, their eyes concealed behind dark sunglasses.