China has warned that “conflict could break out at any moment” as tension over North Korea increases.
Foreign Minister Wang Yi said if war occurred there could be no winner.
Mr Wang’s comments come as the US voices increasing concern at North Korea’s development of nuclear weapons and deploys a Navy carrier group off the Korean peninsula.
China, North Korea’s only backer, fears conflict could cause the regime to collapse and problems on its border.
Mr Wang said: “One has the feeling that a conflict could break out at any moment.
“I think that all relevant parties should be highly vigilant with regards to this situation.”
“We call on all parties to refrain from provoking and threatening each other, whether in words or actions, and not let the situation get to an irreversible and unmanageable stage.”
Adding to Chinese unease, President Donald Trump said on Thursday that “the problem of North Korea” would be “taken care of”.
“If China decides to help, that would be great. If not, we will solve the problem without them! U.S.A.”
The North Korean military responded on Friday by saying it would “mercilessly foil” any US provocation.
“Our toughest counteraction against the U.S. and its vassal forces will be taken in such a merciless manner as not to allow the aggressors to survive,” read a statement from the army, reported in English by North Korea’s official news agency, KCNA.