President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE early Tuesday said that the United States would now be at war with North Korea if it weren't for his summit with leader Kim Jong Un.

"Many good conversations with North Korea-it is going well! In the meantime, no Rocket Launches or Nuclear Testing in 8 months. All of Asia is thrilled. Only the Opposition Party, which includes the Fake News, is complaining. If not for me, we would now be at War with North Korea!" Trump wrote on Twitter.

Many good conversations with North Korea-it is going well! In the meantime, no Rocket Launches or Nuclear Testing in 8 months. All of Asia is thrilled. Only the Opposition Party, which includes the Fake News, is complaining. If not for me, we would now be at War with North Korea! — Donald J. Trump (@realDonaldTrump) July 3, 2018

Trump's tweet follows reports that U.S. officials believe North Korea has increased production of fuel for nuclear weapons despite agreeing to work toward the complete denuclearization of the Korean Peninsula.

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"There's no evidence that they are decreasing stockpiles, or that they have stopped their production," one unnamed U.S. official briefed on the latest intelligence told NBC News last week. "There is absolutely unequivocal evidence that they are trying to deceive the U.S."

Trump became the first U.S. president since the Korean War to accept a meeting with a North Korean leader when he met with Kim last month.

After the meeting, Trump tweeted that there was no longer a nuclear threat from the country.

"There is no longer a Nuclear Threat from North Korea. Meeting with Kim Jong Un was an interesting and very positive experience. North Korea has great potential for the future!" Trump tweeted at the time.

Secretary of State Mike Pompeo Michael (Mike) Richard PompeoTreasury sanctions individuals, groups tied to Russian malign influence activities Navalny released from hospital after suspected poisoning Overnight Defense: Pentagon redirects pandemic funding to defense contractors | US planning for full Afghanistan withdrawal by May | Anti-Trump GOP group puts ads in military papers MORE is expected to travel to North Korea later this week.

Pompeo will meet with Kim and other officials, according to White House press secretary Sarah Huckabee Sanders.

He will remain in North Korea until Saturday to “continue consultations and implement the forward progress made by President Trump and Chairman Kim in Singapore,” the State Department said.