DUBAI, July 1 (Reuters) 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 fulfil their promises of protecting Iran‘s interests under the deal.”

(Writing by Parisa Hafezi Editing by Mark Heinrich)