Drones attacked an Iranian defence factory in the central city of Isfahan overnight, the state-run IRNA news agency reported early Sunday.
It carried a Defence Ministry statement, saying the attack occurred late Saturday and caused minor damage to a rooftop. The report said three drones were shot down by Iranian air defences.
The ministry did not say who was suspected of carrying out the attack.
Separately, Iran's state TV said a fire broke out at an oil refinery in an industrial zone near the northwestern city of Tabriz. It said the cause was not yet known, as it showed footage of firefighters trying to extinguish the blaze.
Iran and Israel have long been engaged in a shadow war that has included covert attacks on Iranian military and nuclear facilities.
Last year, Iran said an engineer was killed and another employee was wounded in an unexplained incident at the Parchin military and weapons development base east of the capital, Tehran. The ministry called it an accident, without providing further details.
1 killed, 2 injured in shooting attack at oil and gas company in Iran
Iranian drones used by Russia in Ukraine shows how war has helped Iran
Iran hangs former defence ministry official Ali Akbari in spy claim
Iran dismisses US' allegations in plot to kill former NSA John Bolton
Iran starts refining crude oil in Venezuela: Petroleum Minister Javad Owji
Iran vows legal pursuit of Trump, Pompeo for Soleimani's assassination
3 killed, 4 injured in second mass shooting in a week in Los Angeles
NATO membership process hasn't stopped, says Finnish, Swedish FMs
Police say at least three dead, four hurt in latest California shooting
3-metre-high flood destroys dozens of homes in Indonesia, 1 killed
Parchin is home to a military base where the International Atomic Energy Agency has said it suspected Iran conducted tests of explosive triggers that could be used in nuclear weapons.
In April 2021, Iran blamed Israel for an attack on its underground Natanz nuclear facility that damaged its centrifuges.
Israel has not claimed responsibility for the attack, but Israeli media widely reported that the country had orchestrated a devastating cyberattack that caused a blackout at the nuclear facility.
Israeli officials rarely acknowledge operations carried out by the country's secret military units or its Mossad intelligence agency.
In 2020, Iran blamed Israel for a sophisticated attack that killed its top nuclear scientist.
Iran has always insisted its nuclear programme is for purely peaceful purposes. US intelligence agencies, Western nations and the International Atomic Energy Agency have said Iran ran an organised nuclear weapons programme until 2003.
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)