U.S. President Donald Trump and North Korean leader Kim Jong Un could meet in Vietnam's capital for their second summit on Pyongyang's nuclear ambitions, the South Korean newspaper Munhwa Ilbo said.

Denuclearization talks have sputtered since Trump and Kim held an unprecedented June meeting in Singapore, with Washington and Pyongyang each calling on the other to take action. A second summit could address concerns to global security after Kim piled pressure on Trump by threatening in his annual New Year's address to take a "new path," if the U.S. didn't relax economic sanctions.

U.S. officials have met their North Korean counterparts in Hanoi for discussions to adjust scheduling for the talks, the newspaper said, citing high-level diplomatic sources in Seoul and Washington it did not identify. Government officials haven't commented on the report.