Israel's army chief General Herzi Halevi, addressing troops on Monday at a military base hit in Iran's unprecedented strike, said Israel will respond.

"This launch of so many (Iranian) missiles, cruise missiles, and UAVs into the territory of the State of Israel will be met with a response," Halevi said when he visited Nevatim base in the country's south, according to a statement issued by the army.

In a separate statement, Israeli military spokesman Rear Admiral Daniel Hagari said "We will do whatever is necessary to protect the State of Israel, and we will do it at the opportunity and the time we will choose."

Iran late Saturday launched more than 300 drones and missiles towards Israel, Israel's military said, in retaliation for a deadly April 1 strike on Iran's embassy consular annex in Damascus, which Iran blamed on Israel.

Israel's military said it intercepted 99 percent of the aerial threats with the help of the United States and other allies, and that the attack caused only minor damage.

The Nevatim base was "lightly hit" in the strike, it said.

On Monday the army released footage of a crater caused, it said, when a construction site at the base was hit in the strike.