North Korea launched at least one ballistic missile into the sea off its east coast on Wednesday, South Korea's military said, News.az reports citing Xinhua.

The launch comes after Pyongyang on Tuesday demanded that the United States and South Korea stop large-scale military exercises, calling them a provocation that may draw "more powerful follow-up measures."

Broadcaster YTN reported that an air raid warning was issued on the South Korean island of Ulleung around the time of the missile launch. A spokesman for South Korea's military said they were checking to see whether the air raid warning was related to the missile launch.