President Trump has tweeted that a cope with Democratic People's Republic of Korea is "very abundant within the making", each day once revealing he had in agreement to satisfy its leader Kim Jong-un.
North Korea has however to create a press release.
Earlier, the White House same the meeting wouldn't happen unless national capital takes "concrete actions" initial.
US media report that Mr Trump created the choice to satisfy while not consulting key figures in his administration.
The top United States diplomat, Secretary of State Rex Tillerson, was on his initial official trip to Africa once the announcement was created.
Speaking to reporters on Friday from Djibouti, Mr Tillerson said: "That may be a call the president took himself."
"I spoke to him terribly early this morning this call and that we had a really sensible speech."
Mixed messages
Mr Trump surprised observers once he in agreement to the summit following letter of invitation delivered by Asian country. No sitting United States president has ever met a North Korean leader.
Confusion mounted once Mr Trump's own press secretary, married woman Sanders, told reporters that Democratic People's Republic of Korea has "promised to denuclearise". She added: "We're not aiming to have this meeting happen till we have a tendency to see concrete actions."
South Korean envoys - UN agency recently met with Mr Kim in national capital - have same Democratic People's Republic of Korea is "committed to denuclearisation" as associate finish goal, however they need not same this could begin before a gathering with the United States.
Instead, Democratic People's Republic of Korea is known to own in agreement to halt its testing programme as negotiations continue.
US Vice-President Mike Pence has pledged to maintain pressure on North Korea, and Mr Trump spoke with Chinese president Xi Jinping on Friday to agree to maintain sanctions for the time being.
There has been no mention of the meeting in North Korean media.
An initial statement from the South Korean delegation said the meeting would take place by May - but no place or date has officially been set.
The Korean border's demilitarised zone (DMZ) and Beijing are seen as possible venues.