Seoul/Washington: North Korea said on Saturday it had conducted another successful test of an intercontinental ballistic missile (ICBM) that proved its ability to strike all of America's mainland, drawing a sharp warning from US President Donald Trump and a rebuke from China.

North Korean leader Kim Jong-un personally supervised the midnight launch of the missile on Friday night and said it was a "stern warning" for the United States that it would not be safe from destruction if it tries to attack, the North's official KCNA news agency said.

North Korea's state television broadcast pictures of the launch, showing the missile lifting off in a fiery blast in darkness and Kim cheering with military aides.

"The test-fire reconfirmed the reliability of the ICBM system, demonstrated the capability of making a surprise launch of the ICBM in any region and place any time, and clearly proved that the whole US mainland is in the firing range of the DPRK missiles, (Kim) said with pride," KCNA said.

DPRK is short for the North's official name, the Democratic People's Republic of Korea.

The launch comes less than a month after the North conducted its first ICBM test in defiance of years of efforts led by the United States, South Korea and Japan to rein in Pyongyang's nuclear weapons ambitions.

The North conducted its fourth and fifth nuclear test last year and has engaged in an unprecedented pace of missile development that experts said significantly advanced its ability to launch longer-range ballistic missiles.

China, the North's main ally, said it opposed North Korea's "launch activities that run counter to Security Council resolutions and the common wishes of the international community."

Early on Saturday, the United States and South Korea conducted a live-fire ballistic missile exercise in a display of firepower in response to the missile launch, the US and South Korean militaries said.

ICBM