Qatar confirmed on Tuesday that US President Donald Trump's special envoys Steve Witkoff and Jared Kushner are in Doha but will not hold direct meetings with Iranian officials.

Qatari Foreign Ministry spokesperson Majed Al-Ansari said at the weekly press briefing that the US delegation would instead meet with mediators to discuss progress in implementing the recently signed memorandum of understanding (MoU) between the United States and Iran.

Al-Ansari also noted that the 6 billion US dollars in frozen Iranian assets have yet to be transferred to Tehran.

The remarks came amid conflicting accounts from Washington and Tehran over the nature of the latest contacts in Doha, with the United States describing the discussions as part of the implementation process for the MoU, while Iran has denied that direct negotiations with US officials are scheduled.