Dem senator mocks Trump over report North Korea increased its nuclear efforts: 'This can't be true!'

Sen. Chris MurphyChristopher (Chris) Scott MurphyFormer Teacher of the Year wins Connecticut primary Live results: Wisconsin, Minnesota, Vermont, Connecticut hold primaries The Hill's Morning Report — Signs of trouble for Republicans in House special election MORE (D-Conn.) chided President TrumpDonald John TrumpNFL players stand in tunnel during anthem, extending protests 12 former top intel officials blast Trump's move to revoke Brennan's security clearance NYT: Omarosa believed to have as many as 200 tapes MORE's claims that North Korea is no longer a nuclear threat amid reports that the country is ramping up its nuclear fuel production.

Murphy reacted Saturday morning to an NBC News report that said U.S. intelligence officials believe North Korea has increased fuel production for nuclear missiles at several secret research facilities.

"This can’t be true!!! President Trump told us 'North Korea is no longer a nuclear threat.' He said he took care of it," Murphy tweeted.

The senator, an outspoken critic of Trump, was referencing comments Trump made after he met with North Korean leader Kim Jong Un.

"Everybody can now feel much safer than the day I took office. There is no longer a Nuclear Threat from North Korea," Trump tweeted shortly after meeting with the North Korean leader.

The NBC News report, which cited five officials familiar with a U.S. intelligence assessment, indicated that North Korea is attempting to deceive the U.S. and show that it's winding down nuclear production.

"There's no evidence that they are decreasing stockpiles, or that they have stopped their production," one official told the news outlet.

After his summit with Kim in Singapore earlier this month, Trump touted the meeting as an overwhelming success. He has since heaped praise on Kim, complimenting the North Korean leader's negotiating skills and saying he "loves his people." Kim's government is accused of starving people in North Korea and torturing prisoners.

Skeptics of the meeting noted that Trump signed an agreement that provided concessions without receiving a concrete commitment to a timeline and method for irreversible denuclearization. They also pointed out that North Korea has made similar agreements in the past, only to renege.