North Korea test-fired at least one multiple rocket launcher (MRL) from a west coast location on Sunday morning, the South Korean military’s Joint Chiefs of Staff has confirmed.

The ROK military told NK News that it is maintaining a readiness posture while tracking and monitoring related activity.

While further details remain unknown as of Sunday afternoon, North Korean rocket launcher tests are a “substantial military threat aimed at South Korea,” said Kim Young-jun, a professor at the Korea National Defense University. 

“If North Korea actually wages attacks on South Korea, it will most likely launch a preemptive strike with multiple