North Korea has failed to launch a missile on its east coast, South Korean and US military officials say, a day after Pyongyang warned the US amid rising tension in the region.
The US said a ballistic missile exploded within seconds of the launch.
Hours earlier, North Korea paraded what appeared to be long-range ballistic missiles at a major military display.
It has already conducted five nuclear tests and a series of missile launches in contravention of UN resolutions.
The latest development comes as US Vice-President Mike Pence heads to the South Korean capital, Seoul, where he is expected to discuss the best way to deal with North Korea’s missile and nuclear programmes.
“North Korea attempted to test an unidentified type of missile from [its eastern port of] Sinpo,” the South Korean defence ministry said, adding that the launch on Sunday had “failed”.
The ministry said that it was investigating for further details.
The US Pacific Command later confirmed the failed test, adding that it had detected and tracked what it believed to be a North Korean ballistic missile.
“The missile blew up almost immediately,” said US Navy Commander Dave Benham, quoted by Reuters.
One unnamed US official said it was unlikely to have been an intercontinental missile, but investigations were continuing.