South Korea’s Yonhap news agency reported earlier on Sunday, citing the South Korean military, that Pyongyang test-fired an unspecified ballistic missile toward the Sea of Japan.

The Japan Coast Guard issued a warning following the launch. A crisis response center has been set up under the Japanese prime minister’s office in connection with Pyongyang's latest test-firing.

The NHK broadcaster reported on Sunday, citing government sources, that the suspected missile launched by North Korea landed outside of Japan's exclusive economic zone.

The latest test-firing comes three days after Pyongyang launched a Hwansong-17 intercontinental ballistic missile in response to joint military drills conducted by the United States and South Korea.