Iran's President Hassan Rouhani said Wednesday its decision to boost uranium enrichment to 60 percent was a response to arch-foe Israel's "nuclear terrorism" against its Natanz facility.
Tehran starting advanced centrifuges and producing more highly refined uranium "is a response to your malice," Rouhani said in a message aimed at the Jewish state.
"What you did was nuclear terrorism," he said in televised remarks, referring to a blast early Sunday that knocked out electricity at its main nuclear facility in central Iran. "What we do is legal."
Israel has neither confirmed nor denied involvement but public radio reports in the country said it was a sabotage operation by the Mossad spy agency, citing unnamed intelligence sources.
Rouhani noted that Iran's security bodies were yet to provide a final report but that the incident appeared to be a "Zionists' crime".