Israel on Saturday warned of further attacks on Iran following deadly retaliatory strikes on Israel which killed at least three and wounded dozens.
Iranian state television reported that air defence was firing in the cities of Khorramabad, Kermanshah and Tabriz, signalling the start of what could be a new Israeli attack.
Their retaliatory strikes on Saturday morning followed an Israeli assault on Iran targeting key figures in Tehran’s nuclear programme and its armed forces the previous day.
Iran’s ambassador to the UN says 78 people were killed and more than 320 wounded in Friday’s strikes.
Israel’s defence minister Israel Katz warned that “Tehran will burn” if Iran continues firing missiles on Israel after at least three people died and dozens were wounded in central Israel on Saturday morning.
The attacks come amid escalating tensions over Tehran’s nuclear programme, which Israel says poses an existential threat.
Israeli Prime Minister Benjamin Netanyahu’s government says the attack on Iran was necessary in order to prevent it from building a nuclear weapon, something Tehran denies seeking – although officials there have at times hinted they could pursue one.
Experts and the US government have, meanwhile, previously assessed that Iran was not working towards developing such a weapon before Friday’s strikes.
Both Israel and Iran said the attacks would continue, increasing the chances of further escalation and expansion of the conflict in the wider Middle East region.
Netanyahu said his objective was to eliminate any Iranian threat to Israel.