North Korea has test-fired another ballistic missile, the BBC quoted South Korean and US military officials as saying on Saturday.
The missile exploded shortly after take-off, they said - the second failed launch in the past fortnight.
US President Donald Trump accused North Korea of showing "disrespect" towards China and its president.
The missile was fired from a site in South Pyeongan province, north of Pyongyang, in the early hours of Saturday local time, South Korea said.
The failed launch came just hours after the United Nations Security Council discussed North Korea's missile programme.
Tensions in the region have increased lately, with both North and South Korea conducting military exercises.
North Korea is believed to be continuing efforts to miniaturise nuclear warheads and fit them on long-range missiles capable of reaching the US.