Iran on Monday accused arch-foe Israel of sabotaging its key Natanz nuclear site and vowed revenge for an attack that appeared to be latest episode in a long-running covert war.

Iran said the person who caused an electricity outage in one of the production halls at the underground uranium enrichment plant had been identified. “Necessary measures are being taken to arrest this person,” Iranian state media reported, without giving further details.

The incident occurred amid diplomatic efforts by Iran and the United States to revive Tehran’s 2015 nuclear deal with major powers, an accord Israel fiercely opposed, after former US President Donald Trump abandoned it three years ago.

Last week, Iran and the global powers held what they described as “constructive” talks to salvage the deal, which has unravelled as Iran has breached its limits on sensitive uranium enrichment since Trump reimposed harsh sanctions on Tehran.

Iranian authorities described the incident a day earlier as an act of “nuclear terrorism” and said Tehran reserved the right to take action against the perpetrators.

On Monday, Foreign Minister Mohammad Javad Zarif explicitly blamed Israel. 

“The Zionists want to take revenge because of our progress in the way to lift sanctions... We will not fall into their trap... We will not allow this act of sabotage to affect the nuclear talks,” Zarif was quoted by state TV as saying.

- Reuters