This is a developing story. Please check back for updates. (Last updated on Oct. 12 at 11:30 a.m. KST with new information from JCS about the launch of multiple missiles.)

North Korea fired a suspected ballistic missile on Monday morning, according to Japanese and South Korean military authorities, the country’s fourth apparent missile test of the last month.

South Korea’s Joint Chiefs of Staff (JCS) said North Korea fired “multiple ballistic missiles from the Pyongyang area toward the East Sea” at around 9:20 a.m. KST.

Japan’s defense ministry issued an initial alert at 9:24 a.m. KST, saying North Korea