A North Korean missile "blew up almost immediately" on its test launch on Sunday, the US Pacific Command said, hours before US Vice President Mike Pence was due in South Korea for talks on the North's increasingly defiant arms program.
The failed launch from North Korea's east coast, ignoring admonitions from major ally China, came a day after North Korea held a military parade in its capital, marking the birth anniversary of the state founder, in which what appeared to be new long-range ballistic missiles were on display.
Pence is due in Seoul at the start of a 10-day trip to Asia in what his aides said was a sign of the US commitment to its ally in the face of rising tension over North Korea.
The US nuclear-powered USS Carl Vinson aircraft carrier strike group is also heading to the region.
The North has warned of a nuclear strike against the United States if provoked. It has said it has developed and would launch a missile that can strike the mainland United States but officials and experts believe it is some time away from mastering the necessary technology.
"The North attempted to launch an unidentified missile from near the Sinpo region this morning but it is suspected to have failed," South Korea's Office of the Joint Chiefs of Staff said in a statement.
The US Pacific Command said the missile "blew up almost immediately", adding the type of missile was being analysed.
There was a high degree of confidence it was not an intercontinental ballistic missile, a US official said on condition of anonymity. A second US official said the launch was land-based.
The timing of the test, coinciding with Pence's trip and a day after the military parade, would suggest deliberate defiance.
Pence had been briefed on the failed launch en route to Seoul and had been in touch with President Donald Trump, White House aides said.
South Korea said it would convene a national security council meeting on Sunday.


