US President Donald Trump meets South Korean President Moon Jae-in in New York on September 23, 2019. (Photo: Yonhap/VNA)

Yonhap news reported that the announcement was released following a NIS closed-door briefing to the chiefs of political parties sitting on the parliamentary intelligence committee. If the two sides can reach an agreement at the upcoming talks, US President Donald Trump and North Korean leader Kim Jong-un could hold their third summit this year, lawmakers quoted the NIS as saying.

The NIS added that, depending the outcome of nuclear negotiations with the US, the Northern leader could visit South Korea in November to attend a special summit between the South and the Association of Southeast Asian Nations (ASEAN), to be held in the southern port city of Busan.

The NIS also said North Korean leader Kim Jong-un could make his fifth visit to China for a summit with Chinese President Xi Jinping. The location may either be near China's border with North Korea or among three northeastern provinces in China.