South Korean President Moon Jae-in has said it is too early to think about a summit with North Korea despite the Olympic-driven rapprochement between the two countries.
President Moon last week received an invitation from North Korean leader Kim Jong-un for a summit in Pyongyang.
The invitation was extended by his younger sister Kim Yo-jong, who visited as part of a high-level delegation to attend the Winter Games in the South.
"There are high hopes for a North-South summit but I think it is a bit rushed," Mr Moon told reporters in Pyeongchang during a visit to the main press centre.
"We have a Korean saying (on acting prematurely), which is 'looking for hot water beside the well'," he added.
North Korea is subject to multiple sets of UN Security Council sanctions over its banned nuclear and ballistic missile programmes and conducted dozens of weapons tests last year.
But the Winter Olympics in Pyeongchang have seen Mr Moon and Mr Kim's younger sister cheering a unified Korean women's ice hockey team, enjoying a concert and dining together.
However Mr Moon said the so-called "Peace Olympics" have highlighted the need for engagement between Washington and Pyongyang.
"The general consensus on the need for dialogue between the US and North Korea is gradually increasing," he said.
"We are waiting for the current inter-Korean talks to lead to dialogue between the US and North Korea, and to denuclearisation."
Washington insists that Pyongyang must take concrete steps towards denuclearisation before any talks can begin, while Mr Moon has long argued for closer involvement to bring it to the negotiating table.