North Korea has launched dozens of missiles this year, several flying over Japan, as it accelerates its program aimed at enabling it to target the United States with a nuclear-tipped missile. Sales of liquefied natural gas are banned outright.
It imposes a 180-day ban on vessels and aircraft that have visited North Korea from visiting the United States. The restrictions announced on Saturday do not apply to crude oil, which makes up the biggest share of energy exports to the North.
Also Thursday, Trump issued an executive order expanding the Treasury Department's ability to target anyone conducting significant trade in goods, services or technology with North Korea and to ban them from the USA financial system.
China accounts for some 90% of the North's trade, making its cooperation critical to efforts to derail Pyongyang's nuclear and missile development.
The measures follow an escalating war of words between North Korean leader Kim Jong Un and U.S. President Donald Trump. They support the latest UN Security Council sanctions but are reluctant to push Pyongyang too hard for fear Kim's government might collapse. However, the underlying message it appears to be giving is one of disbelief that a US president is not backing down and is making such a forceful threat.
President Donald Trump addresses world leaders at the 72nd United Nations General Assembly in NY on September 19, 2017.
Trump has dubbed Kim a "madman" and sought to ratchet up sanctions against the isolated regime, which says it needs nuclear weapons to protect itself against the threat of invasion.
Both leaders have been trading barbs.
"Trump is mentally deranged and full of megalomania", Ri explained to the United Nations General Assembly, adding that the US president is the "gravest threat to global peace and security today".
"None other than Trump himself is on a suicide mission", Ri said in a full-throated rebuke to Trump's remarks.
Kim's Foreign Minister Ri Yong Ho said that the North is considering testing "an unprecedented scale hydrogen bomb" over the Pacific in response to U.S. President Donald Trump's threat at the United Nations to "totally destroy" the country.
The UN Security Council voted on September 11 to limit fuel supplies and ban the North's textile exports. The United States had pressed for a complete ban on oil sales to the North but received pushback from China and Russian Federation.
The flight, which was disclosed shortly before North Korea's foreign minister was due to address the United Nations, was the farthest north of the demilitarized zone separating North and South Korea that any USA fighter jet or bomber has flown in the 21st century, the Pentagon said.
According to United Nations customs data, China sent 6,000 barrels a day of oil products to North Korea in 2016. That would be the equivalent of nearly 5.5 million barrels of crude and 2.2 million barrels of refined products for the full year.
After a week in which through tweets and a speech before the United Nations General Assembly, Trump introduced the derogatory nickname "Rocket Man" for Kim into worldwide news coverage and left open his prerogative to "totally destroy" North Korea, the president gave no ground on Friday in his public standoff with his adversary's leader.