Israeli defence minister Yoav Gallant said that after Israel strikes in Iran, the world will understand the preparations that went into such an operation.

"After we attack in Iran, they will understand both in Israel and in other places what your preparation process includes, and the arrangements and your readiness," Gallant said in a video statement during a visit to an air force base.

Israel has said it would retaliate against Iran for its massive missile attack on Israel on October 1.