Speaking on Wednesday, Iran's chief of staff Maj Gen Mohammad Bagheri told state TV that it would hit infrastructure across Israel if it decides to strike back,
BBC reports.
The barrage "will be repeated with bigger intensity and all infrastructure of the regime will be targeted", Mr Bagheri said.
Iran’s Islamic Revolution Guard Corps said it had targeted unspecified "sensitive security and military" centres in retaliation for the "violation of Iran’s sovereignty and the martyrdom” of Hamas political leader Ismail Haniyeh, who was killed by an explosion in Tehran in July that Iranian officials blamed on Israel, but Israeli officials did not claim.
The statement described the missile barrage as having been "in line with the legitimate right of the nation to defend itself”.
It also said the attack was in response to the Israeli air strike in the southern suburbs of Beirut on Friday that killed Hezbollah leader Hassan Nasrallah and Brig-Gen Abbas Nilforoushan, the operations commander of the IRGC’s overseas arm, the Quds Force.
Later, Iranian state media claimed that missiles had hit the Nevatim, Hazterim and Tel Nof air bases, as well as Israeli tanks in Netzarim – a reference to an Israeli military corridor in central Gaza – and gas installations in the southern Israeli city of Ashkelon.
The attack took place about an hour after a senior White House official told reporters that the US had indications that Iran was preparing to imminently launch missiles at Israel.