US delegation en route to Ankara to discuss Iran sanctions
"The delegation will meet with related institutions, including from the foreign and finance ministries."
Two months ago, President Donald Trump pulled the United States out of a 2015 nuclear pact with Iran reached by his predecessor Barack Obama and other world powers, and ordered tough U.S. sanctions on Tehran.
A senior State Department official said last month Washington had told its allies to cut imports of Iranian oil by November - a call which Ankara publicly resisted.
Turkey, a NATO member in strategic alliance with the U.S., is dependent on imports for almost all of its energy needs.
In the first four months of this year, Turkey bought more than 3 million tonnes of crude oil from Iran, almost 55 percent of its total crude supplies, according to data from the Turkish energy watchdog (EPDK).
Turkish President Recep Tayyip Erdoğan has criticized the United States's withdrawal from the 2015 nuclear deal with Iran as other country leaders have.