The launch, which is the first firing of a ballistic missile by North Korea in two months, comes as U.S. Secretary of State Antony Blinken is visiting South Korea to attend a conference hosted by South Korean President Yoon Suk Yeol on advancing democracy.

Japan's coast guard also reported the launch of what it said appeared to be a ballistic missile by North Korea and specified that it has already fallen.

(Reporting by Joyce Lee in Seoul and Mariko Katsumura in Tokyo; Writing by Jack Kim; Editing by Kim Coghill, Ed Davies)