North Korea's sole major ally China has criticized Pyongyang for conducting another nuclear test.

The Chinese foreign ministry on Friday issued a statement, conveying its "firm opposition" to the Democratic People's Republic of Korea over its latest nuclear test.

"Today the Democratic People's Republic of Korea, regardless of universal opposition from the international community, conducted another nuclear test, to which the Chinese government is firmly opposed," the ministry said in a statement.

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Beijing urged Pyongyang to stop any provocative actions which can further deteriorate the situation in the region. "We strongly urge the DPRK side to honor the commitment to denuclearization, abide by the relevant UN Security Council resolutions and halt any moves that could aggravate the situations."

North Korea said on Friday that it successfully conducted a nuclear test at country's northern nuclear test site. This was North Korea's second nuclear test this year and its fifth since 2006. "This is definitely a higher level of DPRK's technology of mounting nuclear warheads on ballistic rockets," an official North Korean statement said.

"The nuclear test finally examined and confirmed the structure and specific features of movement of nuclear warhead that has been standardized to be able to be mounted on strategic ballistic rocket, as well as its performance and power," North Korea's Nuclear Weapons Institute, said.

The United States, Japan, and South Korea have also denounced North Korea's latest nuclear test. South Korean President Park Geun-hye said that the test is a clear violation of United Nations Security Council's resolutions, describing it as "fanatic recklessness."

TagsNorth Korea, Nuclear test, china, US, South Korea