President Donald Trump pulled the US out of the 12-country trade agreement after his inauguration in January.
"The United States will strengthen its presence in the Asia Pacific", he said.
"I think it's encouraging to see China continue to move forward and join us in this effort to control North Korea", White House press secretary Sean Spicer said at a regular briefing.
That has driven North Korea to issue its own threats and begin preparations for "even a 1 percent chance that the USA will launch pre-emptive strikes", Lim said.
"If the figure of speech used by the U.S. Vice President can be understood as a threat of a unilateral military solution, it is a highly risky path", Lavrov said according to a release from the Moscow's Foreign Ministry.
North Korea's foreign ministry have promised to continue testing missiles in the face of the U.S. threat. The North Korean diplomat accused Washington of creating "a situation where nuclear war could break out at any time" and that Pyongyang's next nuclear test would take place "at a time and at a place where our headquarters deems necessary". He warned the president to be very careful not to explicitly or even implicitly draw a red line when it comes to North Korea.
It was a day after a huge military parade in Pyongyang, which also marked the 105th birth anniversary of Kim Il Sung.
North Korea did not refer to the mix-up but said the United States and its allies "should not mess with us".The Rodong Sinmun, the official newspaper of the North's ruling Workers' Party, did not mince its words in a commentary, saying North Korea was fully prepared for any USA attack. "The U.S. government has not yet made an official request to discuss the Korea-U.S. [Korus] FTA".More news: Pound surge suggests United Kingdom election will yield smoother Brexit
At a working lunch with Japanese Prime Minister Shinzo Abe, the two leaders said they will urge China to do more to rein in Pyongyang, which launched a missile unsuccessfully on Sunday, a day after unveiling what appears to be new missiles.
Pence did not touch on the questions still swirling about why the Trump administration said an armada was headed to the Korean peninsula last week when it was actually headed in the opposite direction. "Most concerning is the fact that the United States trade deficit with South Korea has more than doubled since Korus came into effect".
He was on more solid ground with the North Korean issue, saying: "We appreciate the challenging times in which the people of Japan live with increasing provocations from across the Sea of Japan".
"We will work with you toward that end as we reform Korus in the days ahead", Pence said.
Pence reiterated the commitment to defend US allies in the region from North Korea - which he called "the most unsafe and urgent threat to the peace and security of the Asia Pacific" during remarks to USA and Japanese troops aboard the USS Ronald Reagan at the Yokosuka Naval Base in Japan.
China says it is seriously concerned about North Korean nuclear development, in the wake of a BBC interview with a top official from the North.
In a statement after the talks, the two sides said they had agreed the dialogue should produce "concrete results in the near term". Foreign Minister Wang Yi told reporters Tuesday that China will work with other countries under the framework of the United Nations Security Council.