Local media reported Tuesday morning that North Korea had tested a new missile and fired a missile at the country's military.
AFP quoted the South Korean military as saying that North Korea fired indiscriminate rockets on Tuesday morning.
According to Yonhap News Agency, the Joint Chiefs of Staff of the South Korean Army said in a statement that the nature of the projectile fired by North Korea is still unknown, but it was launched into the East Sea.
Kyodo News Agency also quoted Japanese officials as saying that the missile fired by North Korea could be a ballistic missile.
In recent years, North Korea has used the Sea of Japan to test a number of new short-range ballistic missiles, but it also recently unveiled a new missile fired from a train car, aimed at increasing survival in the face of another country's attack.