VIENNA/TOKYO (Reuters) – Iran is on course to breach a threshold in its nuclear agreement with world powers within days by accumulating more enriched uranium than permitted, although it has not done so yet, diplomats said, citing the latest data from U.N. inspectors. Iran began fuelling its first nuclear power plant on Saturday, a potent symbol of its growing regional sway and rejection of international sanctions designed to prevent it building a nuclear bomb. France, one of the European powers caught in the middle in an escalating confrontation between Washington and Tehran, said it would ask U.S. President Donald Trump to suspend some sanctions on Iran to allow negotiations to defuse the crisis. A week after Trump called off air strikes on Iran minutes before impact, world leaders are trying to pull the two countries back from the brink, warning that a mistake on either side could lead to war. “I want to convince Trump that it is in his interest to re-open a negotiation process (and) go back on certain sanctions to give negotiations a chance,” French President Emmanuel Macron said in Japan, where he is due to meet Trump on the sidelines of a summit in coming days.