We're back to this golden North Korean oldie!

"(We) will further strengthen our war deterrent capabilities in response to U.S. attempts to initiate nuclear war," the prickly state's communist party newspaper Rodong Sinmun said in a commentary.

The North, with one of the world's largest standing armies, usually threatens to bolster its deterrent, often taken to be a reference to its nuclear arsenal, when it feels international powers are not treating it properly.

North Korea has been cooperating on another part of the deal with China, Japan, Russia, South Korea and the United States by starting to take apart its ageing nuclear facility that produces arms-grade plutonium, government officials have said.

In a separate report in its official media on Friday, North Korea said it has slowed the pace of disablement because it does not feel that other parties have supplied aid in a timely manner.

I can imagine it's very cold right now in Pyongyang!