The UN Security Council unanimously approved tough new sanctions against North Korea on Friday in response to its latest launch of a ballistic missile that Pyongyang says can reach anywhere on the US mainland.
The resolution was drafted by the United States and negotiated with the North's closest ally, China.
"We define this 'sanctions resolution' rigged up by the US and its followers as a grave infringement upon the sovereignty of our Republic, as an act of war violating peace and stability in the Korean peninsula and the region and categorically reject the 'resolution,'" North Korea's foreign ministry said in a statement.
"If the US wishes to live safely, it must abandon its hostile policy towards the DPRK and learn to co-exist with the country that has nuclear weapons and should wake up from its pipe dream of our country giving up nuclear weapons which we have developed and completed through all kinds of hardships," said the statement, carried by the North's official Korean Central News Agency.
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DPRK is short for North Korea's official name, the Democratic People's Republic of Korea.
The resolution adopted by the Security Council includes sharply lower limits on North Korea's refined oil imports, the return home of all North Koreans working overseas within 24 months, and a crackdown on ships smuggling banned items including coal and oil to and from the country.
The resolution drew criticism from Russia for the short time the Security Council nations had to consider the draft, and last-minute changes to the text.
Two of those changes were extending the deadline for North Korean workers to return home from 12 months to 24 months which Russia said was the minimum needed and reducing the number of North Koreans being put on the U.N. sanctions blacklist from 19 to 15.