Iranian Foreign Minister Manouchehr Mottaki arrived in Ankara on a surprise visit Tuesday for talks with Turkish counterpart Abdullah Gul.
Mottaki's visit was not announced beforehand and officials would not say what would be on the agenda of the meeting.
Private NTV television said Mottaki was in Turkey to discuss events in Iraq and an upcoming conference on Iraq that is scheduled to be held in Cairo. Iranian officials have said they want the conference to be held in Baghdad instead.
Mottaki might also be seeking Turkish support for the release of Iranian nationals held in Iraq by US forces, NTV said. It did not provide a source for the information.
Turkish Prime Minister Recep Tayyip Erdogan said the request for a meeting came from Iran, and said he did not know yet whether he would also be meeting with Mottaki.