US Secretary of State Rex Tillerson has warned that failure to curb North Korea's nuclear and missile abilities could lead to "catastrophic consequences", while China and Russia cautioned Washington against threatening military force to solve the problem.
While Washington has pressed Beijing to rein in its ally Pyongyang, Chinese Foreign Minister Wang Yi told the UN Security Council on Friday that "the key to solving the nuclear issue on the peninsula does not lie in the hands of the Chinese side".
Mr Tillerson urged the 15-member body to act before North Korea does and called on states to sever diplomatic and financial ties with Pyongyang. He said that because China accounted for 90 percent of North Korean trade, its role was particularly important.
"Failing to act now on the most pressing security issue in the world may bring catastrophic consequences," Mr Tillerson said in his first remarks to the council as secretary of state.
The United States was not pushing for regime change and preferred a negotiated solution, but Pyongyang, for its own sake, should dismantle its nuclear and missile programs, he said.
"The threat of a nuclear attack on Seoul, or Tokyo, is real, and it's only a matter of time before North Korea develops the capability to strike the US mainland," Tillerson said.
While Mr Tillerson repeated the Trump administration's position that all options are on the table if Pyongyang persists with its nuclear and missile development, Mr Yi said military threats would not help.
Mr Yi said dialogue and negotiations were the "only way out" and called on parties to stop arguing over who must take the first step. China wants talks first and action later, while the United States wants North Korea to curtail its nuclear program before such talks start.
"The use of force does not solve differences and will only lead to bigger disasters," he told the council.
Russian Deputy Foreign Minister Gennady Gatilov also said on Friday the use of force would be "completely unacceptable."