Iranian president begins official visit to Turkey
Iran's president begins a landmark trip to Turkey on Monday as the two countries try to build trade ties despite an often fraught competition for regional influence and deep differences over the Syrian war.
Iranian President Hassan Rouhani will meet his Turkish counterpart Abdullah Gul and Prime Minister Recep Tayyip Erdogan in Ankara, where the powerful neighbours are expected to discuss security concerns as well as trade opportunities.
The two sides have had a complex and often dysfunctional relationship, which has taken an especially bitter turn in recent years as a result of increasing competition between Sunni and Shia Muslim powers across the region.
This has become more pronounced following the onset of the Syrian civil war, in which the two have found themselves on opposite sides.