Several UK newspapers reported that the U.S. and North Korea were on the "brink of war".
SHAPIRO: Explain the reason that people anticipate a possible nuclear test by North Korea this weekend.
It did not say why the flights, which operate on Monday, Wednesday and Friday, were being suspended and Air China could not be reached for comment.
Director of Jilin University's Institute of Northeast Asian Studies Guo Rui said that Trump's domestic troubles should prevent him taking such action, while North Korea doesn't appear to be on a war footing. This decision of the U.S. administration raised concerns in North Korea as Pyongyang does not rule out a United States missile strike.
NBC reported on Thursday that the US was preparing to launch a pre-emptive strike against North Korea if the military was convinced the isolated state was about to conduct a nuclear weapons test.
In a separate appearance on the Fox Business Network, Trump said that the North Korean leader Kim Jong-Un was "doing the wrong thing".
North Korea, still technically at war with the South after their 1950-53 conflict ended in a truce but not a treaty, has on occasion conducted missile or nuclear tests to coincide with big political events and often threatens the United States, South Korea and Japan.
A military parade is likely to be held on Saturday to mark Kim Il Sung's anniversary but government minders have not confirmed any details with visiting foreign journalists.
The US president has recently demonstrated his willingness to resort to military methods. They have deployed an [intercontinental ballistic missile] that's capable of reaching the continental United States...that they've never tested.
South Korean military officials said they regard it as a new type of ICBM.
"Trump is always making provocations with his aggressive words", North Korea says. Cold launches would also allow the missiles to be fired from silos. Amid rising regional tensions, Pyongyang residents have been preparing for North Korea's most important.
Other military hardware at the parade included tanks, multiple rocket launchers and artillery, as well as a solid-fuel missile created to be fired from submarines. Also on display was a powerful midrange missile that outside analysts call a "Musudan", and which can potentially reach US air bases in Guam, as well as a new solid-fuel midrange missile that can be fired from land mobile launchers, making them harder to detect before launch.
North Korea has continued its weapons testing in recent months, despite warnings from Mr Trump and other world leaders.
North Korean state media earlier warned the United States to end its "military hysteria" or, "Our toughest counteraction against the USA and its vassal forces will be taken in such a merciless manner as not to allow the aggressors to survive". Still, satellite images show signs that North Korea is preparing another nuclear test. Pyongyang tested two ballistic missiles in the previous year, and claims it is close to developing an intercontinental ballistic missile and nuclear warhead that could reach the US. In March, Pyongyang announced that it had conducted a successful ground test of a rocket engine that could be used on an intercontinental ballistic missile.
As for the Trump administration's policy, the US officials emphasized that no engagement of North Korea is currently taking place, and that the focus now was on pressure.