North Korea fired three missiles toward northern Japan, Japanese broadcaster NHK announced early Tuesday morning, local time, citing Japan's government. The missiles passed over Japan and landed in the ocean, the South Korean news agency Yonhap reported, citing military intelligence. Japan's government issued an emergency warning and urged residents in northeast Japan to seek shelter. The Pentagon issued a statement shortly after the missiles landed. "We assess North Korea conducted a missile launch within the last 90 minutes," the Pentagon wrote in a statement. "We can confirm that the missile launched by North Korea flew over Japan. We are still in the process of assessing this launch. North American Aerospace Defense Command (NORAD) determined the missile launch from North Korea did not pose a threat to North America. We are working closely with Pacific Command Strategic Command and NORAD and will provide an update as soon as possible."