It is being suspected that North Korea had conducted another nuclear bomb.

Two South Korean officials at the Korea Meteorological Administration told CNN that their analysis so far suggests Saturday’s seismic activity around the nuclear site was not caused by an explosion or a collapse of the site. Later, the China Earthquake Administration revised its estimation, saying the quake was not a nuclear detonation.

China has moved to limit the supply of oil to North Korea and will cease buying textiles from its neighbour, it said yesterday.

Textile trade contracts signed before September 11 would be respected if import formalities are completed before midnight on December 10, the statement said.

The United States Geological Survey, the peak body on earthquakes, has yet to determine if the quake was natural or artificially caused.

China’s quake administration says it has detected a magnitude-3.4 tremor in North Korea that was a “suspected explosion”.

On Thursday, the US unveiled its own set of economic sanctions targeting North Korea.

The U.N. sanctions were a response to North Korea’s sixth nuclear test, which experts said was its biggest by far, earlier this month.

US Air Force B-1B Lancer bombers escorted by fighter jets flew in global airspace over waters east of North Korea on Saturday in a show of force the Pentagon said demonstrated the range of military options available to President Donald Trump.

The head of the worldwide nuclear test monitoring agency CTBTO said on Saturday that analysts were “looking at unusual seismic activity of a much smaller magnitude” than the Sept 3 test in North Korea.

Last week, the Council unanimously adopted resolution 2375, imposing fresh sanctions on North Korea over its nuclear test on September 3, which violated previous United Nations resolutions.

North Korea accepted the aid, but continued developing nuclear weapons all the same.

Kim said that Trump is “a rogue and a gangster fond of playing with fire”, who is “unfit to hold the prerogative of supreme command of a country”. “He should have been handled a long time ago by Clinton – I won’t mention the Republicans, right – by Obama”.

Under the agreement, South Korea, Japan, and other nations provided two light nuclear reactors to North Korea, costing close to $4 billion, according to a 1994 report from The Heritage Foundation, in addition to other forms of aid. “You are protected. Nobody’s going to mess with our people”.