China, North Korea's main ally, has called for a peaceful resolution of the Korean tensions.
The Japanese director-general of the International Atomic Agency, Yukiya Amano, confirmed on Thursday that North Korea's programme is developing and suggested United States policy in the region is "reckless", CNN reports.
The main goal of North Korea's nuclear programme is to protect the country's security and to place itself on an even footing with the USA, the Global Times said in the editorial in its Chinese language edition.
Other troops may have been mobilized.
Despite heightened tension on the Korean peninsula and North Korea warning of a nuclear strike against any sign of USA aggression, there were few signs of strain on Thursday on the main border post between China and the reclusive nation.
The country keeps missiles, including 12 Dongfeng-03 ballistic missiles and 24 Dongfeng-21 "Carrier-killer" missiles at the 51st rocket army station in Shenyang, Liaoning Province.
The framework of the Donald Trump administration's approach to North Korea is taking shape, with Washington putting pressure on Beijing to get tough with Pyongyang and offering some payback on trade policy. The US is also carrying out its biggest-ever joint military exercise with South Korea.
USA military planes have also been conducting military drills alongside Japan in the Korean peninsula.
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The editorial has since been removed from state websites, according to multiple sources.
He said the U.S. was becoming "more aggressive" under Mr Trump's leadership than it had been under former president Barack Obama.
North Korean soldiers carry flags in Ryomyong street in Pyongyang, North Korea, on 13 April. About 200 reporters are in Pyongyang to cover the event, including journalists from the USA and Japan. Pyongyang recently launched a long-range ballistic missile and claims it is close to perfecting an intercontinental ballistic missile and nuclear warhead that could attack the US mainland.
Tensions on the Korean peninsula have escalated over Pyongyang's continued nuclear and missile testing programme, with the United States warning it could take unilateral action and sending a navy carrier group to near the Korean peninsula in a show of force aimed at deterring more tests.
He says "America objectively poses a greater threat to peace than North Korea", adding that "the entire world is scared and left guessing if it strikes or not". "It was the relationship which was solidified at Mar-a-Lago that helped make that possible", said the official, on condition of anonymity. If true, the report shows a dramatic escalation in USA policy thinking on the issue. "We need to hammer into the United States and China that no matter what happens, there can not be any decision on the fate of the Korean Peninsula without the involvement of the Republic of Korea".
"We have a very big problem in North Korea", Trump said, alluding to serious U.S. concerns that Pyongyang may be only months away from marrying nuclear and missile technology to build a nuke that can reach the United States mainland. North Korea's military is also heavily dug in, meaning it could be hard to find and destroy key targets, or to secure the North's nuclear weapons even if its leadership were attacked.
Yoshihide Suga, the top spokesman for Japanese Prime Minister Shinzo Abe's government, declined to comment Wednesday on whether the country would support a USA strike on North Korea.