North Korea launched a missile over the northern end of Japan, the Pentagon confirmed Monday evening.

"We can confirm that the missile launched by North Korea flew over Japan. We are still in the process of assessing this launch," the Pentagon said in a statement.

South Korea's Yonhap, citing the country's military, said North Korea fired a ballistic missile that flew through Japan's airspace. It was launched around 6 a.m. Tuesday local time.

"North American Aerospace Defense Command (NORAD) determined the missile launch from North Korea did not pose a threat to North America," the Pentagon statement read, indicating more updates may come later on Monday.

The missile launch is the second over the past week and comes as tensions between the U.S. and North Korea had seemed to be easing up.

The test, if confirmed to be a nuclear test, would be North Korean dictator Kim Jong Un's sixth such test.