KThe northern clock has launched about 10 short-range ballistic missiles to the sea east of the country, the South Korean Army has announced.

According to Reuters, the missiles were launched from the area near the coastal town of Wonsan on Thursday and covered about 250km to the sea.

After the release, South Korea has increased military surveillance and readiness while coordinating operations with the United States and Japan.

South Korean authorities have condemned the concessions, calling them violations of UN Security Council resolutions.

Meanwhile, Japan has announced that the missiles did not appear to have fallen within its exclusive economic zone.

The latest release comes in a period of increased tensions between the two Koreas, while the gynean has conducted more than ten missile testing cases this year.