North Korean state media said on Wednesday that U.S. President Donald Trump had agreed to lift sanctions against Pyongyang in addition to providing security guarantees in the summit with the North's leader, Kim Jong Un, the previous day.
North Korea's official Korean Central News Agency said Trump had made the promise to lift sanction after pledging to end joint military exercises with South Korea.
There was no immediate comment about the issue from any American official.
The North's state media framed Tuesday's summit as a win for Pyongyang, dubbing it "the meeting of the century."
Meanwhile, U.S. Senate Majority Leader Mitch McConnell said he supported the goals set out in Trump's joint statement with Kim but said Washington must be prepared to respond if Pyongyang does not follow through.
"If North Korea does not prove willing to follow through, we and our allies must be prepared to restore the policy of maximum pressure," McConnell said in remarks opening the Senate session.
U.S. Senate Democratic leader Chuck Schumer faulted Trump's agreement with Kim as short on details, saying Trump gave up "substantial leverage" in ongoing talks over Pyongyang's nuclear program.
Some Republican lawmakers and Trump administration officials have said that any agreement with North Korea would be submitted as a treaty needing approval by two-thirds of the U.S. Senate, meaning it would need significant support from among Schumer's fellow Democrats to be enacted.