Iran's presidential election will go to a second round for the first time ever, with former president Akbar Hashemi Rafsanjani facing former Tehran Mayor Mahmoud Ahmadinejad, who opposes detente with the U.S. Rafsanjani gained 21.01 percent of the vote held yesterday, Ahmadinejad 19.48 percent and former parliamentary speaker Mehdi Karroubi 17.28 percent, according to the nation's interior ministry today. The two highest vote-getters in the seven-candidate field advanced to the second round, to be held June 24 or July 1. Karroubi said today that the vote had been ``rigged'' by supporters of Ahmadinejad and called for an investigation. Rafsanjani, 70, and Ahmadinejad, 49, have different approaches towards relations with the U.S., which were severed in 1979 after radical students stormed the U.S. embassy in Tehran, holding 52 people hostage for 444 days. Rafsanjani has called for a ``new chapter,'' while Ahmadinejad rejects any deal with the ``Great Satan.'' ``We are going to have friendly relations with all the countries that show no hostility to us,'' Ahmadinejad told reporters at a press briefing in Tehran today. He put the U.S. in the hostile camp.