Group of Eight leaders said they deplore the violence in the aftermath of Iran's disputed election last month and remain "seriously concerned" about the situation.
French President Nicolas Sarkozy said the statement by G8 leaders "shows the unity of the G8 against the situation in Iran."
The G8 statement, seen by The Associated Press, said G8 leaders "deplore post-electoral violence, which led to the loss of lives of Iranian civilians." The leaders also "condemn the declarations of President (Mahmoud) Ahmadinejad denying the Holocaust."
The statement also criticizes restrictions on the media.
To read more about the G-8 conference:
G8 Leaders Agree to Climate Change Goal
G8 Leaders: World Economy Still Needs Help