SEOUL, South Korea (AP) — The military is still searching for an armed South Korean soldier who fled after killing five of his comrades and wounding seven at an outpost near the North Korean border.

A Defense Ministry spokesman says the sergeant opened fire Saturday night with his standard issue K2 assault rifle at an outpost in Gangwon province, east of Seoul. The official says the soldier, who was scheduled to be discharged from the military in September, fled with his weapon, but it wasn’t clear how much live ammunition he had.

A Defense official says all the wounded are expected to survive, although two were injured seriously.

Thousands of troops from the rival Koreas are squared off along the world’s most heavily armed border.

There’s no indication that North Korea was involved. But tensions between the two countries have been high recently.

Copyright 2014 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.