North Korea fired suspected short-range ballistic missiles off its east coast on Friday, South Korea’s military said, a day after South Korea and the US flew powerful fighter jets in a joint drill that the North views as a major security threat.

South Korea’s Joint Chiefs of Staff said the weapons launched from the North’s east coast Wonsan region travelled about 300 kilometers (185 miles) before landing in the waters between the Korean Peninsula and Japan. Japan’s Chief Cabinet Secretary Yoshimasa Hayashi said a North Korean missile landed outside Japan’s exclusive economic zone.