U.S. President Donald Trump meets with North Korean leader Kim Jong Un on Sentosa Island, Tuesday, June 12, 2018, in Singapore. (AP Photo/Evan Vucci)

North Korea could announce an end to denuclearization talks with the United States when it convenes a meeting of the ruling Workers' Party later this month, a state-run think tank said Friday.

The North said last week it will convene a plenary meeting of the Central Committee of the WPK later this month to address "crucial issues in line with the needs of the development of the Korean revolution and the changed situation at home and abroad."

The announcement came as Pyongyang has ramped up pressure on Washington to come up with a new proposal by the end of this year to move deadlocked denuclearization negotiations forward.

"Unless there is a last-minute turnaround, the North is expected to announce its stance on the U.S. that could include the declaration of an end to denuclearization talks," the Institute for National Security Strategy affiliated with Seoul's spy agency said in a report.

The Workers' Party session "appears to have characteristics as an emergency meeting related to leader Kim Jong-un's year-end deadline," it added. "That it did not specify a date but just said that the meeting will be held in the latter part seems to be designed to expect a change in the U.S. attitude but secure a reason for taking a 'new way' otherwise."

The report said that it has been unprecedented that the North has disclosed a plan in advance to hold a plenary party meeting, adding that last week's announcement appears to be intended to "maximize pressure" on Washington to change tack.