"We'll be conducting more missile tests on a weekly, monthly and yearly basis", Vice Foreign Minister Han Song-Ryol told the BBC's John Sudworth in an interview in Pyongyang.
"I hope that there will not be any unilateral actions like the one we saw recently in Syria".
Vice President Mike Pence took a tough line on North Korea Monday, warning the rogue state not to test the "strength of [U.S.] armed forces", by continuing to build out its nuclear program.
Just ahead of Pence's arrival in Seoul, North Korea attempted and failed to launch an unidentified missile in its latest weapons test, further raising worldwide concerns.
Pence arrived in Seoul on Sunday, hours after North Korea carried out a failed missile launch, CNN reported.
"There was a period of strategic patience, but the era of strategic patience is over", Pence said. North Korean regime began its nuclear program in earnest during the Clinton administration.
On a call with reporters, the State Department told Business Insider there would be a "significant worldwide response" if North Korea carried out further nuclear testing".
"We want to see North Korea abandon its reckless path of the development of nuclear weapons, and also its continual use and testing of ballistic missiles is unacceptable".
"I express again a strong support and alliance to the Syrian government and its people for its work of justice, condemning the United States' recent violent invasive act against your country", Kim said.
"They continue to have very productive discussions", he said".
Pence declared that North Korea had tested the world's patience for two decades and "answered our overtures with wilful deception, broken promises and nuclear and missile tests".
South Korea, which accuses China or discriminating against some South Korean companies working in China, and the United States say the sole objective of THAAD is to guard against North Korean missiles.
The concerns were exacerbated after a North Korean missile exploded during launch on Sunday, U.S. and South Korean officials said. He said North Korea's measures to bolster its nuclear forces are self-defensive "to cope with the US vicious nuclear threat and blackmail", and he said his country "is ready to react to any mode of war desired by the U.S". His national security adviser, H.R. McMaster, said the USA would rely on its allies as well as Chinese leadership to resolve the issues with North Korea.
Pyongyang insists it needs a powerful arsenal - including atomic weapons - to protect itself from what it says is the ever-present threat of United States invasion.
US President Donald Trump held a summit with Chinese President Xi Jinping earlier this month, and has praised China's turning back of North Korean coal ships as a "big step" forward in the effort to enlist Chinese pressure on Pyongyang.
Mr Pence voiced impatience with the unwillingness of Kim Jong-Un's regime to move towards getting rid of its nuclear weapons and ballistic missiles.
"It is heartening to see China commit to these actions".
"We need to apply pressure on North Korea so they seriously respond to a dialogue" with the worldwide community, he said, urging China and Russian Federation to play more constructive roles on the issue. deforested stretch of North Korea from a lookout post in the hillside.
But Pence and Hwang said they were troubled by retaliatory economic moves by China against South Korea companies following the deployment in South Korea of a US anti-missile system known as the Terminal High Altitude Area Defense (THAAD). But China furiously objects to its deployment, saying it could spy on its own defence installations, and has taken apparent retaliatory action against South Korean firms operating in its country.
Plans to deploy the Terminal High Altitude Area Defense (THAAD) system have been controversial in South Korea, with some anxious that it would make the South more of a target for North Korean missiles, and others concerned about the economic revenge being exacted by China.
The vice president reiterated Monday that "all options are on the table" to deal with the threat posed by North Korea.