US President Donald Trump warned today that 'all options are on the table' after North Korea last night fired a ballistic missile over Japan's northern Hokkaido island into the sea.

The test, one of the most provocative ever from the reclusive state, came as US and South Korean forces conduct annual military exercises on the peninsula, angering North Korea which sees them as a preparation for invasion.

North Korea has conducted dozens of ballistic missile tests under young leader Kim Jong Un, but firing projectiles over mainland Japan is rare.

Trump said the world had received North Korea’s latest message "loud and clear".

"This regime has signalled its contempt for its neighbours, for all members of the United Nations, and for minimum standards of acceptable international behaviour," Trump said in a statement released by the White House.

This regime has signalled its contempt for its neighbours, for all members of the United Nations, and for minimum standards of acceptable international behaviour- Trump

"Threatening and destabilising actions only increase the North Korean regime’s isolation in the region and among all nations of the world. All options are on the table."

Trump spoke with Japanese Prime Minister Shinzo Abe and the two agreed that North Korea "poses a grave and growing direct threat to the United States, Japan, and the Republic of Korea, as well as to countries around the world", the White House said.

The Republic of Korea is South Korea's official name.

"President Trump and Prime Minister Abe committed to increasing pressure on North Korea, and doing their utmost to convince the international community to do the same," the statement said.

In China, North Korea's lone major ally, foreign ministry spokeswoman Hua Chunying said the crisis was "approaching a critical juncture", but it was also maybe a turning point to open the door to peace talks.

Russia insisted North Korea abide by UN Security Council resolutions.

"Regarding the launching of the missiles from North Korea, we stick to the resolutions of the United Nations and we insist on the fact that the North Koreans must respect those resolutions from the United Nations," Foreign Minister Sergei Lavrov told a news conference on a visit to the United Arab Emirates, according to a translation of his remarks.

South Korea's military said the missile was launched from near the North Korean capital, Pyongyang, just before 6 a.m.and flew 2,700 km (1,680 miles), reaching an altitude of about 550 km (340 miles).

Four South Korean fighter jets bombed a military firing range after President Moon Jae-in asked the military to demonstrate capabilities to counter North Korea.

South Korea and the United States had discussed deploying additional "strategic assets" on the Korean peninsula, the presidential Blue House said in a statement, without giving more details.

North Korea remained defiant.

"The U.S. should know that it can neither browbeat the DPRK with any economic sanctions and military threats and blackmail nor make the DPRK flinch from the road chosen by itself," North Korea's official Rodong Sinmun said, using the initials of the North's official name, the Democratic People's Republic of Korea. 

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