China Foreign Ministry spokesman Hong Lei said at a daily news briefing that China has "expressed our regret" over Pyongyang's declaration.

WSJ: North Korea to Restart Yongbyon Nuclear Plant

Ambassador Bolton dismissed North Korea's threats that U.N. sanctions would be a declaration of war, saying that the consensus opinion holds that Pyongyang has hurt its standing with its tests and its public statements.

NPR: U.S. Submits New U.N. Punishments for N. Korea