North Korea launched a likely intermediate-range ballistic missile into the East Sea (Sea of Japan) Sunday afternoon, according to South Korea’s Joint Chiefs of Staff (JCS).

The missile was launched from around Pyongyang at 2:55 p.m. and is “presumed” to be intermediate-range, the JCS assessed. It splashed down after flying around 621 miles (1,000 kilometers).

“The ROK military immediately detected, tracked and monitored the North Korean missile as soon as it was launched, and have closely shared the information with the U.S. and Japan” the JCS added later in the evening.

South Korea, the U.S. and Japan implemented a real-time