A border explosion that wounded army personnel was likely the result of a landmine from the North, based on a new assessment by Seoul. The South Korean military believes it is "highly likely" that a North Korean device triggered the blast in the Demilitarized Zone last week, injuring three soldiers. If the finding is confirmed, Seoul said North Korea will bear full responsibility for the incident.

Military officials are weighing all options for a response, describing potential measures as "appropriate, substantial and corresponding." The assessment follows an ongoing investigation into the equipment and blast patterns at the site of the detonation near the inter-Korean border.