UN Secretary General Ban Ki-moon held talks with President Mahmoud Ahmadinejad Wednesday.
During the meeting, they discussed major regional and international issues.
Ki-moon arrived in the Iranian capital Wednesday to attend the 16th Summit of the Non-Aligned Movement to begin on Thursday.
The UN chief was welcomed at the airport by several senior Iranian officials.
It is said that Mr Ban is accompanied by Under-Secretary General Jeffrey Feltman, his top Advisor Angela Kane and his spokesman Martin Nesirky.