UPDATE 7:55 P.M. EST:
North Korea launched what appears to be a short-range SCUD ballistic missile Monday morning, according to the U.S. military.
"The missile was tracked for six minutes until it landed in the Sea of Japan," according to a statement from U.S. Pacific Command.
"We are working with our Interagency partners on a more detailed assessment. We continue to monitor North Korea's actions closely," the statement added.
North Korea fired an "unidentified projectile" off its east coast Monday morning, according to South Korea's military.
Officials said this appears to be the latest test launch of a ballistic missile as North Korea continues its push to develop an intercontinental ballistic missile capable of reaching the U.S. mainland.
South Korea's Joint Chiefs of Staff released a statement saying the North launched the projectile from the coastal town of Wonsan at dawn.
"The launch was immediately reported to President Moon and he ordered to call for an NSC [National Security Council] meeting," the statement obtained by ABC News explained.
South Korea's Yonhap news agency said the projectile is believed to be a ballistic missile, but the country's military said it was still working to determine what exactly was launched.
If confirmed, this would be the ninth ballistic missile test North Korea has conducted this year.
Japan's Defense Ministry told ABC News that the projectile may have landed inside its economic exclusion zone, which extends 200 nautical miles from the shoreline.
Both South Korea and Japan have condemned the launch.
A spokesman for the National Security Council told ABC News President Donald Trump has been briefed on the situation.
White House says Trump has been briefed on NKorea missile launch that landed in Japan's EEZ— Julia Macfarlane🇬🇧 (@juliamacfarlane) May 28, 2017
The Associated Press contributed to this report.