Israeli officials are warning of a full-scale regional war, Axios reported on Wednesday, and the officials told the site that Israel will launch a “strong response” to Tuesday’s massive missile attack within days, which could target oil production facilities inside Iran and other strategic sites.

Israel and Iran are estimated to be closer than ever to opening a new and more dangerous front in the war engulfing the Middle East.

Iran threatened on Tuesday that if Israel responded forcefully to the nearly 200 rockets it fired on Tuesday, it would attack again, and if that happens, Israeli officials say all options would be on the table, including strikes on Iranian nuclear facilities.

“We have a big question mark about how the Iranians will respond to the attack, but we are taking into account the possibility that they will go all out, which will be a completely different game,” an Israeli official told the site.

Many Israeli officials point to Iranian oil facilities as a possible target, but some say targeted assassinations and the destruction of Iranian air defense systems are also possibilities.

The Israeli response could include air strikes from fighter jets as well as covert operations similar to the one that killed Hamas leader Ismail Haniyeh in Tehran two months ago.

Israel responded to Iran's missile and drone attacks on Israel last April with a very limited Israeli strike against an S-300 air defense battery in Iran, ending the exchange of direct attacks.

Israeli officials said Israeli retaliation would be more significant this time.

According to Israeli media, the Israeli security cabinet met on Tuesday in an underground government bunker inside a mountain near Jerusalem.

The meeting began as the first wave of Iranian ballistic missiles made their way toward Israel.

US and Israeli missile defense systems intercepted many of the Iranian missiles. The ones that weren’t intercepted hit open areas near an air base in southern Israel, the Mossad headquarters, and a military intelligence base north of Tel Aviv.

Axios quotes an Israeli Defense Ministry official as saying that dozens of Iranian missiles were fired at the Mossad headquarters, but none of them hit the compound.

At the start of the security cabinet meeting, Israeli Prime Minister Benjamin Netanyahu indicated the next step Israel would take, and Netanyahu said in a video clip released by his office: "Iran made a big mistake tonight and will pay for it," according to the website.

Netanyahu continued: "The regime in Iran does not understand our determination to defend ourselves and our determination to respond to our enemies. They will understand. We will abide by the rule that we established: whoever attacks us, we will attack him."

Two Israeli officials said the cabinet meeting ended after several hours with an understanding that there would be an Israeli military response but without a clear decision on what that response would be.

A senior Israeli official told the website that one of the reasons the decision was not made at the cabinet meeting is that Israeli officials want to consult with the Biden administration.

According to the website, while Israel will respond alone, it wants to coordinate its plans with the United States due to the strategic implications of the situation. The Israeli official said that any further Iranian attack in response to an Israeli response would require defensive cooperation with the US Central Command, more munitions for the Israeli Air Force and possible other types of US operational support.

In turn, US President Joe Biden said on Tuesday that the United States and Israel are discussing a response to the Iranian attack and "it remains to be seen" what the outcome will be.

A US official in talks between the Biden administration and the Israeli government said on Tuesday that the United States had made clear that it supported the Israeli response but believed it should be measured.

Biden said he would speak with Netanyahu about responding to the Israeli attack. An Israeli official said the call could take place on Wednesday, several hours before the Jewish New Year holiday.