North Korea accuses South Korea of a “serious provocation” after South Korean troops fired warning shots Tuesday at North Korean soldiers setting up barriers along their tense border.

Pyongyang has accused Seoul forces of provocation after troops fired during a tense incident along the demarcation line. The claim coincides with joint South Korean-US military drills.

Captured during the Korean War and imprisoned for decades for refusing to renounce his communist beliefs, 95-year-old Ahn Hak-sop now has a single dying wish: to return to North Korea and be buried alongside his comrades.