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.
South Korea’s Joint Chiefs of Staff said the attempted launch happened at 05:20 local time off the North’s east coast, but there were no further details.
A report in the Yonhap news agency quoted sources saying this fourth failed test may also have been of a Musudan missile.