(CNN) -- North Korea on Friday responded to tougher sanctions from the U.N. Security Council with another barrage of vitriol, repeating a vow to ditch all nonaggression pacts with the South. A day after the isolated regime in Pyongyang had threatened a possible "pre-emptive nuclear attack," something analysts say they think is unlikely, its official news agency reeled off a number of agreements with South Korea that it said would no longer apply. It's the latest installment in a week of furious rhetoric from the North, fueled by its anger over the U.N. vote on the new sanctions, a response to North Korea's recent nuclear test, and joint military drills by the United States and South Korea, which take place in the region each year.
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NEW: North Korea says sanctions over the years only caused it to bolster its nuclear deterrent
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The U.N. Security Council voted unanimously to approve new measures
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China calls for all parties to calm down but stands behind new U.N. sanctions
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North Korea responds with a fresh statement of angry threats
United States
A military clash could risk drawing in the @placeholder, which has about 28,500 troops stationed in South Korea as part of the security alliance between the two countries.
Pyongyang
Claiming its enemies are "hell bent on confrontation and war fever," @placeholder said it was now revoking "all agreements on nonaggression reached between the North and the South," a declaration it has made in previous years.
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North Korea
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North Korea
Claiming its enemies are "hell bent on confrontation and war fever," Pyongyang said it was now revoking "all agreements on nonaggression reached between the @placeholder and the South," a declaration it has made in previous years.