Iran's UN envoy, Amir Saeid Iravani, says Tehran reserves its right to defend itself and hit any threat coming from Israel "wherever and whenever it deems necessary".
Loud explosion at military plant in central city of Isfahan was caused by "unsuccessful" drone attack, says Tehran.
Tehran's decision to move the facility comes as diplomatic efforts to restore Iran’s tattered nuclear deal appear stalled.
Thousands of people, riding cars and motorcycles, take to the streets in major cities across Iran to mark the 43rd anniversary of the 1979 revolution.
The Nobel laureate has been detained since the generals ousted her government in the early hours of February 1, ending the Southeast Asian country's brief democratic interlude.
The demonstration was the first to turn violent since protests over water shortages kicked off on November 9.
Police are using tear gas to disperse farmers who have been on a two-week-long peaceful sit-in to protest water shortages in the region.
The episode came a day after the country said it had started up advanced uranium enrichment centrifuges at the site, in a breach of its commitments under a 2015 nuclear deal.
The facility has returned to normal working conditions after about two hours and Isfahan's power supply has been uninterrupted, says the managing director of Isfahan's electricity company.
Iranians have been suffering under sanctions and have been pummeled by the pandemic, but they aren't panicking.
The downing of the Ukrainian airliner, a harsh crackdown on protests and a drastic vetting system could mean Iranians stay home in large numbers on election day.
The traders' strikes in Iran that began on Monday appeared to have ended on Wednesday but the underlying issues of economic hardships that include currency devaluation and inflation have yet to be resolved.
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