The speaker of Iran’s parliament, Ali Larijani, is visiting Turkey amid rising tensions between the neighbours.
Turkey’s leaders have denounced the violent suppression of anti-government protests by the Syrian government – Tehran’s main ally in the region.
Iran has also been irritated by Turkey’s willingness to host part of a Nato missile defence shield.
Earlier this month, Turkey offered to try to restart international talks on Iran’s controversial nuclear programme.
The talks have stalled since world powers met in Istanbul a year ago.
