Updated

The United States says it has requested an emergency meeting of the U.N. Security Council along with Japan on the latest North Korean missile launch.

The U.S. Mission to the United Nations said a council meeting has not yet been scheduled.

South Korean officials said a ballistic missile fired from a North Korean submarine on Wednesday flew about 500 kilometers (310 miles), the longest distance achieved by the North for such a weapon.

That means all of South Korea, and possibly parts of Japan, are within its striking distance.

A North Korean nuclear test in January and a series of missile launches by Pyongyang have all been carried out in violation of Security Council resolutions.