An official for the hermit kingdom’s foreign office said US airstrikes on Syria were “absolutely unpardonable” and legitimised Kim Jong-un’s armament programme.
The unnamed official, who was quoted on the state-run propaganda news agency KCNA, said anything Kim Jong-un does is now justified.
In response to claims the Syrian missile strike was also a message to North Korea, the official said his country was not scared.
Kim Jong-un said America's Syria air strike meant he had to improve his own military
He said: “Some forces are loud-mouthed that the recent U.S. military attack on Syria is an action of warning us but we are not frightened by it.
“We will bolster up in every way our capability for self-defence to cope with the US evermore reckless moves for a war and defend ourselves with our own force.”
Secretive images revealed as North Korea prepares for war
Wed, April 5, 2017
A look at North Korea's firepower as it pursues its nuclear and ballistic missile programs in defiance of the United States and its allies.
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People watch a television news showing file footage of a North Korean missile launch, at a railway station in Seoul
The official added Kim possessed "tremendous military muscle with a nuclear force as its pivot”.
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It comes after a senior US intelligence source hinted Mr Trump was considering moving nuclear weapons to South Korea – the first such American deployment since the Cold War.
Kim Jong-un watching a missile test in North Korea
The top official said peaceful approaches and sanctions had not worked in the worldwide attempt to quash the bloodthirsty Kim dynasty.
He said: “We have 20 years of diplomacy and sanctions under our belt that has failed to stop the North Korean program.”
The official said a course of action being considered by Mr Trump was to move nuclear weapons to South Korea – the first US deployment of its kind since the Cold War.
Donald Trump approved a missile strike on a Syrian air base
He said: “I'm not advocating pre-emptive war, nor do I think that the deployment of nuclear weapons buys more for us than it costs.”
READ MORE: What will Donald Trump do about North Korea?