Tehran - Turkish President Abdullah Gul arrived in Tehran on Tuesday to attend the 10th summit of the Economic Cooperation Organization (ECO).

But the visit is overshadowed by press reports in both Turkey and Iran that Gul will deliver a message from US President Barack Obama to his Iranian counterpart Mahmoud Ahmadinejad.

The ECO summit will be held on Wednesday, but Gul and Ahmadinejad were scheduled to meet later Tuesday at the presidential office.

Gul said before his departure to Tehran that Iran should review its political stance, adding that the arrival of Obama in the White House had been very important and that as a result "all countries must rethink their policies."

"Without stability and security, economic growth is not possible," Gul warned.

Washington has indicated plans to change its policy toward Tehran and resume direct talks after three decades of diplomatic estrangement.

Tehran has welcomed the plan but says that future relations should be based upon mutual respect and US acknowledgement of Iran's international rights, including the pursuing of its controversial nuclear programme.

The Islamic government in Turkey has reportedly agreed to act as mediator in this regard. (dpa)