SEOUL, Jan. 6 (Yonhap) -- South Korea vowed Wednesday to take all necessary measures to punish North Korea for carrying out its hydrogen bomb test in defiance of international warnings.
South Korea "strongly condemn North Korea for going ahead with a fourth nuclear test in a clear violation of U.N. Security Council resolutions," Cho Tae-yong, deputy chief of the presidential office of national security, said in a statement.
He also said South Korea will closely cooperate with the United States and other regional partners to take all necessary measures, including additional U.N. sanctions, against North Korea.
North Korea earlier announced that it had succeeded in conducting a hydrogen bomb test.
The North's nuclear test could prompt the U.N. Security Council to tighten its sanctions against North Korea. The communist country has already been under U.N. sanctions for its previous nuclear tests in 2006, 2009 and 2013.
Last year, President Park Geun-hye warned that there will certainly be a price to be paid if North Korea goes ahead with provocative actions that violate the U.N. Security Council resolutions.
Park was presiding over a session of the National Security Council to discuss how to deal with North Korea's hydrogen bomb test.
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