North Korea has attempted to fire a ballistic missile off its east coast but the launch appears to have failed, South Korean military officials say.
It is unclear what type of missile it was, but it follows three failed tests of the medium-range "Musudan" missile in April.
The North is banned by the UN from using any ballistic missile technology. Tensions have run high in the region after Pyongyang's fourth nuclear test in January and numerous missile tests.
Also today, the newly promoted vice-chairman of North Korea's ruling Workers Party, Ri Su-yong, arrived in China for what South Korean media said was an unannounced official visit.