(FOX NEWS) — President Trump said on Tuesday said “the world is watching” North Korea after the regime promised not to use nuclear or conventional weapons against Seoul and expressed a willingness to hold talks with the United States on denuclearization.

President Trump tweeted hours after South Korea’s presidential national security director, Chung Eui-yong, released a statement detailing his rare two-day visit to North Korea. He praised the “possible progress” but remained cautious.

“Possible progress being made in talks with North Korea. For the first time in many years, a serious effort is being made by all parties concerned. The World is watching and waiting! May be false hope, but the U.S. is ready to go hard in either direction!” Trump tweeted.

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