SEOUL, South Korea (AP) — A 95-year-old former North Korean soldier who spent decades imprisoned in the South will continue his campaign to return to the North, an activist said Thursday, after South Korean troops stopped his symbolic border march this week.

Flanked by activists and holding a North Korean flag, Ahn Hak-sop walked toward an inter-Korean bridge in the border town of Paju on Wednesday, demanding that South Korean authorities arrange his repatriation to the North, when soldiers stopped him at a checkpoint.

Ahn, who complained of knee pain during the incident, was taken to a hospital and is now recovering at his home in Gimpo, near the capital city of Seoul, activist Cha Eun-jeong said. Cha said she expects Ahn to join a weekend protest in Seoul calling for his return to North Korea.

“He said it felt good to have an opportunity to speak his mind in front of journalists,” even though he was turned back by the soldiers, Cha said.

Ahn was born in what is now South Korea’s border island of Ganghwa in 1930, when the Korean Peninsula was under Japanese colonial rule. Japan’s defeat in World War II liberated Korea, but the peninsula was then divided into a U.S.-backed, capitalist South and a Soviet-supported, socialist North — a separation cemented by the devastating 1950–53 Korean War.