North Korea conducted its first intercontinental ballistic missile launch in a month, possibly testing a new more mobile, harder-to-detect missile for the first time.

Afghan Voice Agency(AVA)_Monitoring, Japan briefly urged residents on a northern island to take shelter in an indication of its vigilance over North Korea’s evolving missile threats.

The missile was launched on a high angle from near the North Korean capital of Pyongyang and fell in the waters between the Korean Peninsula and Japan following a 1,000-kilometer (620-mile) flight, South Korea’s Joint Chiefs of Staffs said in a statement to media.

South Korean officials say North Korea has not been responding to their calls on a set of cross-border inter-Korean hotlines, designed to prevent accidental clashes, for about a week, according to Al Jazeera.