The meeting would mark the first direct engagement since President Donald Trump ordered strikes on Iran’s nuclear facilities last month.
"We have no travel announcements at this time," a White House official told Axios. The Iranian mission to the UN declined to comment.
The discussions, brokered with help from Omani and Qatari officials, follow a 12-day war between Israel and Iran that ended under a US-negotiated ceasefire. Witkoff and Araghchi have maintained contact during and since that conflict, the sources said.
Israel's Channel 12 first reported the planned meeting.
A key topic will be Iran’s growing stockpile of highly enriched uranium, including 400 kilograms enriched to 60%. US and Israeli officials say the material is currently inaccessible, sealed off by rubble at the bombed enrichment sites in Natanz, Fordow, and Isfahan.
Iran has since announced the suspension of all cooperation with the International Atomic Energy Agency, citing a law passed by its parliament.
In a post on X, Araghchi said Iran remained committed to its Safeguards Agreement and the Nuclear Non-Proliferation Treaty, but added that any coordination with the IAEA would now be managed through Iran’s Supreme National Security Council.
“In accordance with the new legislation... our cooperation with the IAEA will be channeled through Iran's Supreme National Security Council for obvious safety and security reasons,” he wrote.
Araghchi told CBS on Monday that talks with the United States are unlikely to resume soon, following US airstrikes on three major nuclear sites during the 12-day war with Israel.
“I don’t think negotiations will restart as quickly as that,” Araghchi said in his first interview with an American news outlet since the June airstrikes.
“We will have to first ensure that America will not revert to targeting us in a military attack during the negotiations.”
No final date for the Oslo meeting has been confirmed, and neither side has publicly acknowledged the planned talks.