North Korea calls US strikes on Syria 'unforgivable'

Jong Su-hyon of North Korea scores past Nicole Jackson of Britain during their game at the International Ice Hockey Federation Women's World Championship Division II Group A at Gangneung Hockey Centre in Gangneung Gangwon Province on April

North Korea has been trying to develop a long-range missile carrying a nuclear warhead that is capable of hitting the USA mainland, a distance of about 8,000 kilometers.

"(Japan) will continue to coordinate with the United States and the rest of the global community in strengthening our response to North Korea", Abe said.

"If you violate worldwide agreements, if you fail to live up to commitments, if you become a threat to others, at some point a response is likely to be undertaken", Tillerson told ABC's "This Week".

A third option is covert action, infiltrating US and South Korean special forces into North Korea to sabotage or take out key infrastructure - for instance, blowing up bridges to block the movement of mobile missiles. The North has long claimed that the preparing some kind of assault against it and justifies its nuclear weapons as defensive in nature.

"We can not rely on our missile-defence system to defeat it and expose the American people to a nuclear attack".

While we don't yet have an answer to the first question, the second has already been answered: a U.S. Navy carrier strike group has been ordered to the Korean Peninsula. Pyongyang said they were an exercise targeting USA military bases in Japan.

North Korea is ready to deliver the "most ruthless blow" if provoked by the United States, its ambassador to Moscow said on Thursday, after President Trump pledged to keep building up defences against Pyongyang.

The response by North Korea's foreign ministry, carried by the official KCNA news agency, was the first since USA warships in the Mediterranean Sea launched dozens of missiles at a Syrian air base which the Pentagon says was involved in a chemical weapons attack earlier in the week.

The US Department of State "strongly urges" its citizens to avoid all travel to North Korea on its Web site, urging would-be visitors to "consider what they might be supporting".

Some experts think North Korea has tried to make sure the two world leaders are aware Pyongyang has a bargaining chip in any forthcoming moves to clam down on its weapons programs.

Image: Japanese Prime Minister Shinzo Abe and U.S. President Donald Trump pose for a photograph before attending dinner at Mar-a-Lago Club in Palm Beach, Florida, U.S., February 11, 2017.

It comes a day after the North fired its own ballistic missile into the Sea of Japan - which analysts dubbed a warning ahead of a China-US summit, at which Pyongyang's accelerating atomic weapons programme is set to top the agenda.