Non-essential U.S. embassy staff and their dependents have been ordered to leave Iraq due to unspecified security risks, sources from the U.S. State Department said on Wednesday.

"Based on our latest analysis, we decided to reduce the footprint of our mission in Iraq," the State Department said in a statement.

"We are constantly assessing the appropriate personnel posture at all our embassies," it added.

Aslo on Wednesday, U.S. Defense Secretary Pete Hegseth approved the voluntary departure of U.S. military dependents from the Middle East.

The security risks leading to the ordered departure from Iraq are not immediately clear. According to media reports, Iran recently threatened to strike U.S. bases in the region if negotiations over Iran's nuclear program fail.

U.S. President Donald Trump told a podcast on Wednesday that he was growing less confident in reaching a nuclear deal with Iran.

"I don't know," Trump told the "Pod Force One" podcast when asked about talks over the Iran nuclear program. "I don't know. I did think so, and I'm getting more and more - less confident about it."

Later on Wednesday, when asked why families of U.S. military personnel were authorized to leave the Middle East, Trump said: "You will have to see."

White House special envoy Steve Witkoff is expected to meet Iranian Foreign Minister Abbas Araghchi this weekend for a sixth round of nuclear talks.