This is a developing story, please check back later for updates. (Last updated on Jan. 30 at 12:50 p.m. KST)

North Korea fired an "intermediate-range ballistic missile (IRBM)" from the Muphyong area of northwestern Jagang province toward the East Sea at 7:52 a.m. Sunday, South Korea's Joint Chiefs of Staff (JCS) said, as Pyongyang continues one of its most active sprees of weapons testing ever.