Iran will likely resume some nuclear activities related to uranium enrichment next week, Iran's top nuclear negotiator was quoted by the state-run news agency as saying Saturday. "It's unlikely that uranium enrichment ... which takes place in Natanz will be resumed but it's likely that some activities at Isfahan Uranium Conversion Facility will restart next week," the official Islamic Republic News Agency "IRNA" quoted Hasan Rowhani as saying. The central cities of Natanz and Isfahan house the heart of Iran's nuclear program.