Democratic People's Republic of Korea's (DPRK) leader Kim Jong Un is expected to visit Russia soon, Yonhap reported on Monday, citing President Moon Jae-in.
The president of the Republic of Korea (ROK) spoke of Kim's imminent travel plan at a Cabinet meeting without giving any further details, Yonhap said.
It came a day after U.S. Secretary of State Mike Pompeo traveled to Pyongyang.
Both the DPRK and U.S. said Pompeo's visit and meeting with Kim paved the way for a second Trump-Kim summit.
Pompeo also held closed-door talks with Moon on Sunday in Seoul, briefing the ROK side about the outcome of his trip to Pyongyang on Sunday.
Pompeo held talks with Kim that lasted for several hours and it seemed like they had brought good results, ROK's Foreign Minister Kang Kyung-wha told reporters.
But she remained cautious about the outlook of the summit, Yonhap said.
"There was no talk of a specific date," she said. When asked if the Kim-Trump talks would be held before the U.S. mid-term elections in early November, she said all possibilities remain open.
On her proposal for the U.S. to hold off its demand for the list of the DPRK's nuclear weapons, the minister said the Trump administration seems to "be making preparations with lots of flexibility."
The ROK's Blue House said earlier that Pompeo told Moon that the U.S. and DPRK sides agreed to arrange a summit between Kim and President Donald Trump "as soon as possible" and discussed potential U.S. monitoring of Pyongyang's steps towards denuclearization.
The U.S. State Department said Washington and Pyongyang will hold working-level meetings soon to "refine options for the location and date of that next summit." The negotiations will be led by Stephen Biegun, U.S. special representative for Pyongyang, and Choe Sun-hui, DPRK's vice foreign minister, it said.
In the meantime, Choe is traveling to Moscow for a trilateral meeting scheduled on Tuesday with her counterparts from Russia and China, according to the Russian government.