North Korea fired multiple suspected ballistic missiles on Monday morning, according to Japanese and South Korean military authorities, the country’s fourth apparent missile test in 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 said the test involved “at least two” missiles fired in two launches 17 minutes apart.

The first was a short-range ballistic missile launched at 9:19 a.m. KST that flew for under seven minutes, reaching a distance of around 137 miles (220