The attack comes as tensions have reached new heights over Tehran's rapidly advancing nuclear programme.
Israel has carried out strikes on Iran, a dramatic escalation of long-running tensions between the two countries.
The attack comes as tensions have reached new heights over Tehran's rapidly advancing nuclear programme.
Air raid sirens preventatively rang out in Israel.
Israel's Prime Minister Benjamin Netanyahu said in an address on YouTube that the country launched a targeted military operation to roll back the Iranian threat to Israel's very survival.
He added that the attacks will continue "for as many days as it takes to remove this threat".
Dozens of commercial airliners were in Iranian airspace as the strikes took place, according to flight tracking websites.
More than one hour after the Israeli attack, some were still making their way out of Iranian airspace. But some abruptly altered course to more quickly exit the area. Many nations' jets already did not overfly Iran due to regional tensions.
The strikes came after Israel first threatened to go after Iran’s nuclear facilities in early November following a series of back-and-forth missile attacks between April and October last year.
In a televised address, Iran’s president Masoud Pezeshkian promised a "powerful response".
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