Added time: 30 January 2014, Thursday 16:04
Turkey change relations with Iran?
Turkish Prime Minister Tayyip Erdogan visited Iran on Wednesday to bolster trade and energy ties.
Iran has been a strong strategic ally of Syrian President Bashar al-Assad since the start of the uprising against him.
Analysts said the main focus of Erdogan's visit was expanding economic cooperation, finessing any political disputes for now.
Erdogan signed three trade deals on Wednesday before leaving Tehran to fly home, Iranian state television said.
No details were released about the three trade pacts or Erdogan's meetings with Khamenei and Rouhani, who plans to visit Turkey within the next few months, according to Iranian and Turkish media.
U.S. Treasury Under Secretary David Cohen, who visited Turkey just before Erdogan's Iran trip, warned the Turkish government against any rapid improvement of trade and economic links with Iran.
Iran was Turkey's third largest export market in 2012. Turkey exports more than 20,000 products to Iran, among them gold and silver.
The gold trade boomed in 2012 when Ankara was paying for Iranian natural gas and oil imports with the Turkish Lira and Tehran was using those deposits held in Turkey's state-run Halkbank which was in center of briebery and corruption scandals to buy gold.