North Korea fired what appeared to be two cruise missiles into the sea off its east coast on Tuesday, days after a flurry of ballistic missile tests.
South Korea's Joint Chiefs of Staff said it is assessing the launches to determine the nature of the projectiles.
Such a launch would be its fifth missile test of the year, as North Korean leader Kim Jong Un has vowed to bolster the military with cutting-edge technology at a time when talks with South Korea and the United States have stalled.
