North Korea has again blamed the United States for the failure of the February summit in Vietnam between President Trump and Kim Jong Un, saying there will be no progress until Washington changes its approach to denuclearization talks.

“Unless the United States puts aside the current method of calculation and comes forward with a new method of calculation, the DPRK-U.S. dialogue will never be resumed and by extension, the prospect for resolving the nuclear issue will be much gloomy,” an unnamed North Korean foreign ministry spokesman told the state-run Korean Central News Agency.