Israel has the right to defend itself, Foreign Minister Penny Wong says, but she has dodged questions over whether its surprise bombardment of Iran is a breach of international law.
Seeking to hamper Iran's attempts to develop military-grade nuclear capability, Israel struck military facilities, nuclear scientists, a major gas facility that exports internationally and other targets in a two-day barrage that Iran says has killed 78 people.
Iran retaliated with missile launches of its own that killed at least three people in Israel, with the US helping to shoot down a number of incoming missiles.
Israel's Prime Minister Benjamin Netanyahu has threatened Iran to expect worse to come.