The United Nations Security Council has unanimously condemned North Korea for carrying out an underground nuclear test Monday. It was North Korea’s second nuclear test in three years. Susan Rice, the US ambassador to the United Nations, said it is too early to tell if the Security Council will approve a new round of sanctions against North Korea.

Susan Rice: “What we heard today was swift, clear, unequivocal condemnation in opposition to what occurred. The meeting was brief, and everybody spoke, and everybody essentially took the same view. We are now resolved to work on a resolution. We believe it ought to be a strong resolution with appropriately strong contents, but obviously unless and until we have completed the process of negotiating that resolution, it would be premature to suggest what its contents would be.”

In a statement Monday, North Korea said the nuclear test was intended to “bolster up its nuclear deterrent for self-defense in every way.” Hours after the Security Council vote, North Korea fired two more short-range missiles. In response to the nuclear test, South Korea announced it would immediately join a US-led initiative to intercept ships suspected of carrying nuclear, chemical and biological weapons, component parts or missiles to deliver them. Pyongyang has warned it would consider South Korea’s membership in the Proliferation Security Initiative to be an act of war. At the White House, President Barack Obama denounced North Korea’s actions.

President Obama: “North Korea’s actions endanger the people of Northeast Asia, they are a blatant violation of international law, and they contradict North Korea’s own prior commitments. Now, the United States and the international community must take action in response.”