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South Korea has sent a letter to the president of the U.N. Security Council urging North Korea to take responsibility for last month's land mine explosions in the Demilitarized Zone that injured three South Korean soldiers, Yonhap and Korea Times report. The letter calls on Pyongyang to apologize and take responsibility for violating the Korean War Armistice, and follows North Korea's claim that the incident was fabricated. Foreign ministry spokesperson Park Doo-soon confirmed the letter was sent, and it has been circulated to UNSC member states, according to KBS World and Maeil Business.