(CNN) - President Obama sent a direct message to Iran's supreme leader, Ayatollah Ali Khamenei, weeks before this month's disputed election, Iranian sources said Wednesday.
The letter requested dialogue and engagement between the two nations, the sources said.
The sources said Khamenei has yet to reply to the letter but nonetheless it "had set the negotiating table in order for both sides to sit around it after the election."
Khamenei made an indirect reference to the letter in his sermon Friday at Tehran University.
"The U.S. president said that we were waiting for a day like this to see people on the street," the Iranian leader said. "Some people attributed these remarks to Obama and then they write letters to say we're ready to have ties; that we respect the Islamic republic and on the other hand they make such comments. Which one should we believe?"