SEOUL-- South Korea's presidential chief of staff Noh Young-min held an unannounced meeting in Seoul last month with Reince Priebus, the former chief of staff to U.S. President Donald Trump, ruling camp officials said Sunday.

The March 28 meeting, which was limited to a very small number of people, was seen as part of behind-the-scene efforts by Cheong Wa Dae to keep alive dialogue momentum in the stalled denuclearization talks following the breakdown of Trump's summit with North Korean leader Kim Jong-un in Hanoi, the sources said.

"As far as I know, they exchanged views on the atmospheres of the two countries, including reactions in political circles, in the wake of the breakdown of the Hanoi nuclear summit," a ruling camp official said on condition of anonymity.

The two sides appear to have also exchanged opinions on the upcoming summit between Trump and President Moon Jae-in as well as the roles South Korea should play for the sake of the denuclearization of the Korean Peninsula, the official said.

Moon and Trump are set to hold talks at the White House on Thursday.

It will be the first time the two leaders will have met since the Hanoi summit broke down due to differences over how to exchange denuclearization measures for sanctions relief. How to break the impasse in the nuclear negotiations is expected to be a key topic for the Moon-Trump summit.

Source: Yonhap News Agency