Abolfazl Zohrehvand was quoted by the Iranian state news agency as saying that the plot to take Mahmoud Ahmadinejad's life would have involved inflicting him with extreme radiation poisoning at the place where he stayed during the UN World Food Summit.
The allegations came after Mr Ahmadinejad, who the West claims is trying to develop nuclear weapons, claimed that he had been the target of an assassination plot during his trip to Iraq last March.