The U.S. military says North Korea launched a missile Sunday morning, bnut it blew up nearly immediately after launch.

"The North attempted to launch a missile, but we presume that the launch ended in failure", a JCS official said, declining to be named.

A North Korean missile exploded during launch Sunday, U.S. and South Korean officials said, a high-profile failure that comes as a powerful U.S. aircraft supercarrier approaches the Korean Peninsula in a show of force.

The North launched a ballistic missile from the same region earlier this month ahead of a summit between the leaders of the United States and China to discuss the North's arms programme.

Pyongyang fired off the missile from a land-based launch facility in Sinpo, South Hamgyong Province, at around 6:20 a.m., the JCS said, noting that it needed further analysis to determine the exact type of the missile and other details.

That test also failed, as there was "no evidence the missile reached flight", a USA official told CNN.

North Korea fired an unidentified ballistic missile on Sunday morning that exploded nearly immediately after launch, defying warnings from the Trump administration to avoid any further provocations.

Trump has ordered a navy strike group flagshipped by a nuclear-powered aircraft carrier to head to the region as a show of force as his officials assess tougher economic sanctions as well as military options against the North.

North Korea has conducted five nuclear tests, including two previous year.

President Donald Trump has suggested that the US will take a tougher stance against North Korea, telling reporters last week: "North Korea is a problem".

A second USA official said the launch was land-based.

President Donald Trump have been in contact, aides to the vice president said.

According to the newspaper, NSC is reportedly considering evacuating Japanese nationals from South Korea and finding ways to protect Japan from the risk of disguised North Korean soldiers entering the country amid a possible inflow of refugees.

North Korea declared itself a nuclear power in 2005. He arrived in South Korea shortly after a failed missile launch by the North that surrounded the birth anniversary of North Korea's late founder. "I have great confidence that China will properly deal with North Korea".

The North regularly launches short-range missiles, but is also developing mid-range and long-range missiles meant to target USA troops in Asia and, eventually, the US mainland. This matters because while North Korea regularly launches short-range missiles, it is also developing mid-range and long-range missiles meant to target US troops in Asia and, eventually, the USA mainland.