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Iranian security forces have shot dead three men believed to be attackers, amid reports of a suicide bombing in the central Iranian city of Isfahan.
According to the semi-official Fars news agency, the explosion, which happened on Friday, was a suicide attack on the headquarters of Iran’s Atomic Energy Organisation in Isfahan, which comes near Iran’s Natanz uranium enrichment plant.
“Around 8.30am … an armed terrorist group has attacked the office of Atomic Energy Organisation,” said the governor of Isfahan province, Reza Haddadad.
The semi-official ISNA news agency said the first explosion was believed to have been a suicide attack.
Haddadad denied Iranian reports that there had been another explosion near the headquarters later. “No second explosion was reported and there were no casualties,” he said.
No one immediately claimed responsibility for the attack. Last week, Iran and the US blamed each other for a car bomb that killed Iran’s deputy ambassador to Argentina, Mehdi Khosrojerdi, in Isfahan.
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US intelligence officials suspect Islamic State was responsible for that attack.
Iran is concerned that US president Donald Trump may soon pull out of the 2015 deal under which Iran agreed to halt its nuclear programme in return for relief from international sanctions.
Last month, Trump threatened to pull out of the deal unless Iran meets a series of demands.