US President Donald Trump's envoys Steve Witkoff and Jared Kushner will attend an expected meeting with Iran in Doha on Tuesday, White House spokeswoman Karoline Leavitt said.

"Special Envoy Witkoff and Jared Kushner will be flying to Doha for high-level meetings this week, as we continue to discuss the memorandum of understanding. On the sidelines of those high-level talks, there will be the technical talks," she said in an interview with Fox News on Monday.

Trump said in a social media post on Monday that Iran had requested the meeting, but did not provide further details.

The meeting comes as Washington and Tehran continue indirect negotiations over a memorandum of understanding, with technical talks expected to take place on the sidelines of the high-level discussions in Doha, according to White House spokeswoman Karoline Leavitt.

This is a developing story.