North Korea fires four missiles, some landing just 200 miles off of the coast of Japan in the Sea of Japan.
Reuters reports the move comes just days after the country promised retaliation over U.S.-South Korea military drills, which are seen by North Korea as war preparation.
The Washington Post reports tensions in the area are high after the firings.
NBC News reports according to two senior defense officials, there were in fact five firings, but one of the missiles failed to launch.
Reuters reports the U.S. has about 28,500 troops standing by in South Korea and Japan plans to reinforce its ballistic missile defenses.