By Michelle Nichols
UNITED NATIONS, April 28 (Reuters) - U.S. Secretary of State Rex Tillerson will press the United Nations Security Council on Friday to further isolate North Korea by swiftly imposing stronger sanctions in the event of further provocations by the reclusive state, including a long-range missile launch or sixth nuclear test.
Tillerson, in his first visit to the United Nations, will chair a ministerial meeting of the 15-member body. It comes just days after council ambassadors said President Donald Trump made clear - over lunch on Monday at the White House - that he would be the U.S. leader to deal with Pyongyang, ideally peacefully.
"They are now in the phase of working out what the best way to do that is," said a senior council diplomat, speaking on condition of anonymity. "It was left hanging that there clearly would be a military solution if needed."
The Trump administration is focusing its North Korea strategy on tougher economic sanctions, possibly including an oil embargo, a global ban on its airline, intercepting cargo ships and punishing Chinese banks doing business with Pyongyang, U.S. officials told Reuters earlier this month.
Washington is also stepping up pressure that began under the Obama administration against Cambodia, Laos and Malaysia, which have diplomatic and financial links to Pyongyang, to downgrade or cut diplomatic ties with North Korea.
The United States, which is president of the Security Council for April, urged members - in a note outlining Friday's meeting - to "show their resolve to respond to further provocations with significant new measures."
Diplomats say further provocations are considered a nuclear test or long-range missile launch.
U.S. State Department spokesman Mark Toner said Tillerson would on Friday push the international community to stand up to North Korea.
"Certainly, we've talked a lot about China's role ... that's a key aspect of this new strategy, is putting pressure on China, convincing China they need to do more, but this also needs to be a global effort," Toner told reporters.
U.N. Secretary-General Antonio Guterres is due to brief the Security Council on Friday, which will include foreign ministers from China, Britain and Japan. Tillerson is due to meet with his South Korean and Japanese counterparts before the council meeting and with his Chinese counterpart, Wang Yi, afterwards.
China has long promoted dialogue to resolve the "Korean nuclear issue," and the United States says it is open to talks, but they disagree over the sequence.
"The U.S. require (North Korea) to take some actual action to curtail their nuclear program, which could then be followed by talks, and the Chinese position is talks first, action later," the senior U.N. diplomat said.