At a press conference in Tehran, Erdogan said Turkey and Iran had a lot of things to do in their region and stated that Turkish and Iranian officials discussed bilateral relations as well as regional and global issues.

Asked if he made his visit to Iran as part of a mediator role between Iranian officials and the United States over Iran's nuclear program, Erdogan said the major goal of his visit was to boost trade volume between the two neighbors.

Erdogan is expected to travel to United States in a couple of weeks.

"We have set a goal to increase trade volume to 20 billion USD by the year 2011. Mr. Rahimi (Iran's First Vice President Mohammad Reza Rahimi) has revised it as 30 billion and we said (why not)," Erdogan said.

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