US Secretary of State Mike Pompeo made an unscheduled, fleeting visit to Iraq, amid growing tensions with Iran, BBC reports.
Mr Pompeo cancelled a trip to Berlin to meet with Iraqi leaders during a four-hour stop in the capital Baghdad.
He told the leaders that the US doesn't "want anybody interfering in their country", and asked them to protect US troops in Iraq.
The visit came days after the US deployed an aircraft carrier, USS Abraham Lincoln, to the region.