The Israeli military spokesman said there were very few injuries after Iran’s Revolutionary Guards said they had fired “tens of missiles” at Israel in the “first wave” of attacks

Air raid sirens sounded and explosions were heard in Tel Aviv and near Jerusalem.

Israeli air defences shot down dozens of Iranian missiles that flew over Syria, Syrian army sources told Reuters.

Per the latest reports, the Israeli military has said it is safe to get out of bomb shelters.

Iran's Revolutionary Guards warned that if Israel retaliated, Tehran's response would be "more crushing and destructive," Iranian state TV reported.

"After a period of restraint, Iran has targeted the heart of the occupied territories with tens of missiles following the martyrdom of [Hamas leader] Ismail Haniyeh ... the intensification of the Zionist regime's attacks on Lebanon and Gaza, the martyrdom of Hezbollah leader Hassan Nasrallah and [of] Guards Commander Abbas Nilforoushan," the Iranian statement, read aloud on TV, said.

A senior Iranian official told Reuters the missile launches were ordered by Supreme Leader Ayatollah Ali Khamenei, who has remained in a secure location since Israeli airstrikes on Beirut killed Nasrallah last week.

Tehran is "fully prepared" for an Israeli retaliation, the official added.

The Iranian statement warned this attack represented only a “first wave,” without elaborating.