Iran launched a barrage of missiles and drones at Israel on Saturday, in what the Israeli diplomat described as an "unprecedented event".

Some of the 300-plus Iran weapons were fired from Syria, and Lebanon, and almost all of them were shot down.

Iran said the attack was in response to Israel's strike on its consulate in Syria.

In coming days, it's expected Israeli diplomats and officials will discuss the attack with Australian counterparts.

G7 leaders condemned Iran's attack against Israel and reaffirmed their commitment to Israel's security during a meeting on Sunday.

US President Joe Biden has told Israeli Prime Minister Benjamin Netanyahu to "think very carefully and strategically" about his government's response.

The US has also told Israel it will not participate in any retaliatory strikes against Iran and world leaders are calling for restraint, fearing further escalation.

Mr Cantor said Israel reserved the right to defend itself.

Prime Minister Anthony Albanese condemned the attack.

"This escalation is a grave threat to the security not just of Israel, but of the entire region.

"It risks greater instability and devastation across the Middle East."

Asked if Australia would impose further sanctions on Iranian officials, Mr Albanese said his government had already used Magnitsky-style sanctions on 85 individuals and almost 100 Iranian entities.

"We have taken strong action," he said, adding he would not announce further measures during media interviews.

Australians in the region, particularly those in Tel Aviv, Oman or Baghdad should follow the advice of local authorities and monitor local media for public safety updates.

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