· Iran has played down a reported strike on its territory
· Israel has not commented but was identified as the attacker by U.S. sources
· Oil prices dropped in the aftermath on suggestions that Iran will not retaliate
Cyclists pass a poster in Tehran. /VCG
Iranian state media have said that explosions heard near the city of Isfahan were caused by anti-aircraft fire.
Sources cited in the U.S. said Israel had launched an attack in retaliation for an Iranian missile barrage last week but Israel's military declined to comment.
The scale of any damage is unclear, although the International Atomic Energy Agency said nuclear sites located in the area were untouched.
Israeli security minister Itamar Ben-Gvir, who had urged Prime Minister Benjamin Netanyahu to deliver an overwhelming show of force against Iran, posted a single word on social media: "Weak".
READ MORE
What are China's 'New Productive Forces?'
Genetic clues to left-handedness revealed
Expectations had been mounting for several days that Israel would respond after Iran on Saturday night fired more than 300 warheads, almost all of which were destroyed in the air.
Tehran said that action was retribution for the killing of several of the country's senior military commanders at a diplomatic property in Syria earlier in the month.
Following the latest incident, Reuters quoted an Iranian official saying there were no plans to reply.
Subscribe to Storyboard: A weekly newsletter bringing you the best of CGTN every Friday