World

The U.N. Security Council responded swiftly to North Korea's latest nuclear test by punishing the reclusive regime Thursday with tough, new sanctions targeting its economy and leadership, despite Pyongyang's threat of a pre-emptive nuclear strike on the United States.

The penalties came in a unanimous resolution drafted by the U.S. along with China, which is North Korea's main benefactor. Beijing said the focus now should be to "defuse the tensions" by restarting negotiations.

The resolution sent a powerful message to North Korea's new young leader, Kim Jong Un, that the international community condemns his defiance of Security Council bans on nuclear and ballistic tests and is prepared to take even tougher action if he continues flouting international obligations.

"Taken together, these sanctions will bite, and bite hard," U.S. Ambassador Susan Rice said. "They increase North Korea's isolation and raise the cost to North Korea's leaders of defying the international community."

The new sanctions came in response to North Korea's underground nuclear test on Feb. 12 and were the fourth set imposed by the U.N. since the country's first test in 2006. They are aimed at reining in Pyongyang's nuclear and missile development by requiring all countries to freeze financial transactions or services that could contribute to the programs.

North Korea kept up its warlike rhetoric Friday after the U.N. vote, issuing a statement saying it was cancelling a hotline and a nonaggression pact with rival South Korea.