Momentum for a second summit between U.S. President Donald Trump and North Korean leader Kim Jong Un has reportedly gained steam, with a source close to Pyongyang's position telling CNN that there is a "strong possibility" of another meeting before the year's end.

The report Tuesday cited the unidentified official as pointing to the recent exchange of letters between Trump and Kim as a positive sign. Trump received a letter last week from Kim and had U.S. Secretary of State Mike Pompeo deliver a response to North Korea's foreign minister at the Association of Southeast Asian Nations (ASEAN) meeting Saturday.

The official said that although the date and location of the summit have yet to be determined, it would take place "sometime later this year."