North Korea test-launched three ballistic missiles in the waters of the Sea of Japan (known in Korea as the East Sea) on Monday, South Korea’s Joint Chief of Staff reported.

The missiles – believed to have included Rodong medium-range types – were launched at 12:14pm KST from Hwangju County, North Hwanghae Province, the JCS said, with at least one traveling around 1,000km into waters protected by Japan’s Air Defense Identification Zone.

The launch came a few hours after South Korea’s President Park Geun-hye and Chinese President Xi Jinping wrapped up a bilateral meeting on the sidelines of the G20 summit