Citing a top secret U.S. government document leaked by former intelligence contractor Edward Snowden, North Korea’s Minju Joson newspaper has attacked America’s cyber warfare policy calling it an “open threat to mankind” and a “declaration of the cyber war.”

The Presidential Policy Directive 20, an October 2012 paper that outlined U.S. cyber operations policy for those in the highest officials in the U.S. government, called for a list of potential targets for possible U.S. cyber attacks under the umbrella of “Offensive Cyber Effects Operations.”

That’s likely worried North Korea, which probably has a better chance than many other nations of making such a list.

“This means that the U.S. is ready to mount a fierce cyber attack on anyone going against the grain with it! any moment,” the newspaper said according to a report of the commentary that was carried on the Korean Central News Agency (KCNA).

Both KCNA and the Minju Joson are state-controlled, like all media in North Korea.

The cyber attack in Internet network may bring irrevocable financial and material damage to the opponent side in a moment.

This is nothing but an open threat to mankind and the declaration of the cyber war.

The U.S. move can never be justified as it is aimed to make the internet network, which should contribute to civilization and development of mankind, a tool for implementing its strategy for world domination.

The U.S. has to stop at once the anachronistic acts stemming the advance of mankind to peace, prosperity and development. — Minji Joson via KCNA, August 10, 2013.

North Korea itself has been widely reported to be building up its own cyber attack capability and has been blamed for several attacks on South Korean computer networks and companies.

Most recently, South Korean investigators said they found evidence of North Korean involvement in a June 25 cyberattack that hit several South Korean government and private-run websites. Seoul’s Ministry of Science, ICT and Future Planning said it had found an IP address linked to North Korea while analyzing the attacks.

One of the attacks targeted the website of the South Korean president and resulted in the site being offline for most of the day.