The UN says Iranian President Mahmoud Ahmadinehad dropped a reference to Holocaust denial from his speech at a UN racism conference. The prepared English text of Ahmadinejad's speech said the West had used "the ambiguous and dubious question of the Holocaust" in setting up the state of Israel. UN spokeswoman Marie Heuze says he omitted the remark in his delivery in Farsi on Monday. The French and English interpreters also dropped the phrase. Although his speech was an attack on Israel, some delegates stayed in the room because they said he stopped short of denying the Holocaust - a supreme offense for many Jews. Heuze said Tuesday that Farsi speakers confirmed Ahmadinejad's deviation from the official text provided by the Iranian government.