Though it lacked substance, the impromptu meeting was the first between Trump and Kim since their second summit in Vietnam in February collapsed without any agreement due to squabbling over US -led sanctions on the North, and the two leaders agreed to resume working-level nuclear talks.
The sanctions suspension could help build trust between the two long-time foes and provide a model that could be expanded as North Korea takes further disarmament steps, Yonhap said, citing the person close to the White House. Conversely, a failure to meet US demands will lead to the sanctions being renewed.
Kim accepted and at their Sunday meeting, Trump became the first sitting USA president to set foot in North Korea when he crossed the demarcation line.
A senior US official said USA policy continued to be to maintain sanctions on North Korea until it gives up its nuclear weapons and the State Department reiterated that it expected countries around the world to fully implement and enforce them.
The meeting paved the way for a resumption in diplomacy between Washingon and Pyongyang, even though North Korea's public reaction to the talks has since been less sanguine than that of the United States.
On Friday, an influential Tokyo-based pro-DPRK outlet said the USA would need to take "sincere measures" to build trust between the two countries.
"I will say that I did actually speak to Steve Biegun about (a sanctions suspension), and he categorically denied that", State Department spokesperson Morgan Ortagus said, responding to a question concerning an article in South Korea's Yonhap.
Chinese Foreign Ministry spokesman Geng Shuang told reporters that Xi briefed Trump on China's position on North Korea when they met on the sidelines of the G20 summit in Osaka.
The two leaders promised to seek denuclearization in exchange for security and sanctions relief and made some good faith measures, but both sides expressed frustration with the slow pace of progress in the following months.
Until earlier this year, North Korea had urged that United Nations sanctions, aimed at thwarting its nuclear and ballistic missile ambition, be lifted, while claiming that it has started to take concrete measures toward denuclearization.
North Korea has been seeking concessions such as sanctions relief in exchange for steps it takes toward dismantling its nuclear capabilities, while the United States has continued to hold onto a "maximum pressure" strategy that calls for complete denuclearization first. That's a good thing, not a bad thing.
Ortagus denied the report, quoting top USA negotiator on North Korea Stephen Biegun as calling it "completely false".
The Hwasong-14, another North Korean ICBM tested in mid-2017, was also mentioned in the report, and said to be capable of reaching "most" of the U.S. mainland, given its 10,000km+ (6250 mile) range.