North Korea missile test was an intercontinental ballistic missile (ICBM)

The US has confirmed that North Korea on Tuesday tested an intercontinental ballistic missile (ICBM). Secretary of State Rex Tillerson called it a “new escalation of the threat” to the US and the world and warned that Washington “will never accept a nuclear-armed North Korea”.

Pyongyang earlier said it was its first successful intercontinental ballistic missile test. US officials believe the North may now be able to fire a missile to Alaska.

However, experts say it cannot accurately hit a target.

In response to the test over the Sea of Japan, the US and South Korea conducted a “combined [military] exercise to show our precision fire capability”, Pentagon spokeswoman Dana White said in a statement.

The US also asked for an urgent meeting of the UN Security Council to discuss the issue. A closed-door session of the 15-member body is expected later on Wednesday.

Tillerson stressed that “global action is required to stop a global threat”.

And he warned that any nation that provided economic or military benefits to the North or failed to fully implement UN Security Council resolution was “aiding and abetting a dangerous regime.

The announcement on North Korea state television said the Hwasong-14 intercontinental ballistic missile (ICBM) test was overseen by leader Kim Jong-un.

It said the projectile had reached an altitude of 2,802km (1,731 miles) and flew 933km for 39 minutes before hitting a target in the sea.

North Korea, it said, was now “a full-fledged nuclear power that has been possessed of the most powerful inter-continental ballistic rocket capable of hitting any part of the world”.

North Korea’s official KCNA news agency later quoted Kim Jong-un as saying the test was a “gift” to the Americans on their independence day.

The launch, the latest in a series of tests, was in defiance of a ban by the UN Security Council. But experts also believe that Pyongyang does not have the capacity to miniaturise a nuclear warhead that can fit onto such a missile.