 He says it was later determined it was a replica pellet gun. Iran's presidential election is heading to a runoff. CBS News correspondent Liz Palmer is in Tehran. Vote counting continues, but it's already clear neither of the frontrunners has a clear majority, which means a runoff between the reformer Massoud Pazeshkian and the hardliner Saeed Jalili next Friday. CBS News Brief. I'm Wendy Gillette.