Iran will enrich uranium above 3.67% fissile purity, Foreign Minister Mohammad Javad Zarif said on Monday, if European countries fail to salvage a 2015 nuclear deal between Tehran and world powers. The 3.67% level is that deemed suitable for generating civilian nuclear energy. Above that would mark the first step in a process that could eventually be put to producing the more highly refined material that can be used for a nuclear warhead. Iran has always denied it has any plans to develop an atom bomb. 'Our next step will be enriching uranium beyond the 3.67% allowed under the deal,' Zarif said, according to the state-run Iranian broadcaster IRIB. 'The Europeans have failed to fulfill their promises of protecting Iran's interests under the deal.'