China Relations: US, Japan and S Korea discuss North before summit

Meantime, North Korea threatened to conduct more missile testings in response to the two-month-long Foal Eagle exercise between the US and South Korea, which will last through April.

Swift said a military response remained among those options.

Tensions on the Korean peninsula and the Trump-Xi summit began to worry markets on Thursday, with the dollar and Wall Street shares slipping.

The 15 members said they were concerned about North Korea's "highly destabilizing behavior" and "flagrant and provocative defiance of the Security Council".

The new USA administration has repeatedly suggested it will take a harder line toward Pyongyang, saying ex-President Barack Obama's policies that relied on diplomatic pressure and economic sanctions have failed.

"The President emphasized that the United States stands with its allies Japan and South Korea in the face of the serious threat that North Korea continues to pose", the release stated on Wednesday.

In Tokyo, Mr Abe said Mr Trump had reaffirmed that all options are available in dealing with North Korea's nuclear and missile programmes.

The North is believed to be developing an intercontinental ballistic missile (ICBM) that could hit the United States and its leader, Kim Jong Un, has vowed to test-launch one at any time. The North has defied the ban, saying it infringes on its sovereign rights to self-defence and the pursuit of space exploration.

Analysts said a military strike would be the President's riskiest move, because of the potential for North Korea to attack Seoul, or the 28-thousand American troops near the demilitarized zone.

President Trump's unexpected decision to launch 59 Tomahawk missiles at a Syrian airfield early Friday is a clear message to North Korea that the White House is willing to act militarily when its security is compromised, experts say.

Despite angry opposition from Beijing, the United States started to deploy the first elements of its advanced anti-missile defense system in South Korea last month.

The symbolic meeting between the two superpowers came two days after North Korea fired a ballistic missile off its east coast Wednesday morning, which flew about 60 kilometers (37 miles) before coming down in the East Sea.

Likewise, U.S. Air Force Commander of the U.S. Strategic Command, Gen. John Hyten, expressed his anguish about the lengthy delays and instability in the budget and he said that it is hindering the ability to modernize the nation's capabilities of nuclear deterrence.

A USA official said Wednesday's missile test ended in failure when the rocket spun out of control and plunged into the ocean in a fiery crash.

The South Korean military said the missile was sacked from land near the east coast city of Sinpo and flew only about 60 kilometers (40 miles).

  • Leroy Wright