Israel’s military chief said Monday that his country will respond to Iran’s weekend attack, but he did not elaborate on when and how as world leaders urged Israel not to retaliate, trying to avoid a spiral of violence in the Middle East.

The Iranian attack on Saturday came in retaliation for a suspected Israeli strike two weeks earlier on an Iranian consular building in the Syrian capital of Damascus that killed two Iranian generals. It marked the first time Iran has launched a direct military assault on Israel despite decades of enmity dating back to the country’s 1979 Islamic Revolution.

Iran launched hundreds of drones, ballistic missiles and cruise missiles at Israel in the attack. The Israeli military said that 99% of the drones and missiles were intercepted, by Israel's own air defenses and warplanes and in coordination with a U.S.-led coalition of partners.

Israeli military chief Lt. Gen. Herzi Halevi said Monday that Israel is considering its next steps but that the Iranian strike “will be met with a response.”

Halevi gave no details. The army's spokesman, Rear Adm. Daniel Hagari, said Israel will respond “at the time that we choose.”

Both men spoke at the Nevatim air base in southern Israel, which Hagari said suffered only light damage in the Iranian attack.

Prime Minister Benjamin Netanyahu has been huddling with top officials to discuss a possible response. For a second straight day, the government made no announcements on any decisions.

In a conversation with U.S. House Majority Leader Steve Scalise, Netanyahu said that “Israel will do whatever is required to defend itself,” the prime minister's office announced.

While Israeli leaders have hinted at retaliation, the government is under heavy international pressure not to further escalate the conflict — especially after the Iranian strike caused such little damage.

The U.S. has urged Israel to show restraint as it seeks to build a broad diplomatic response. The Group of Seven advanced democracies issued a joint statement “unequivocally condemning in the strongest terms” the Iranian attack while expressing “full solidarity and support to Israel.”

The U.S. also has been working in recent years to strengthen ties between Israel and moderate Arab states in an alliance to counter Iran.

Much of that cooperation has been under the umbrella of the U.S. Central Command, which oversees U.S. military operations in the Middle East. Centcom works closely with militaries across the region, including Israel, Jordan, Saudi Arabia and other Arab countries.

The U.S., Britain and Jordan — a key American ally in the region — have all said their air forces helped intercept the Iranian missiles and drones. Halevia said France and “other partners” were involved, and he noted that “Iran’s attack has created new opportunities for cooperation in the Middle East.”

The Iranian weapons also flew through Saudi skies, according to a map released by the Israeli military. Israel says most of the interceptions took place outside of Israeli airspace, indicating at least tacit cooperation with the Saudis.

A unilateral Israeli strike could strain these behind-the-scenes contacts, particularly with countries like Saudi Arabia that do not have official diplomatic relations with Israel. It also could risk opening a new front with Iran at a time when Israel is bogged down in a six-month war inside Gaza against Hamas militants.

Israel and Iran have been on a collision course throughout the Gaza war. The war erupted after Hamas and Islamic Jihad, two militant groups backed by Iran, carried out a devastating cross-border attack on Oct. 7 that killed 1,200 people in Israel and kidnapped 250 others.

Israel’s offensive in Gaza has killed over 33,700 Palestinians, according to local health officials, and caused widespread devastation.

Throughout the war, Israel has traded fire across its northern border with Lebanon’s Iranian-backed Hezbollah militant group, while Iranian-backed militias in Iraq and Yemen have also attacked Israel. The friction has kept up fears of a potentially destructive all-out war between Israel and Hezbollah, or a broader direct confrontation between Israel and Iran.

World leaders pressed Israel not to strike Iran.

British Prime Minister Rishi Sunak said “all sides must show restraint” to avoid a rising spiral of violence in the Middle East. French President Emmanuel Macron said Paris will try to “convince Israel that we must not respond by escalating.”

In Washington, U.S. National Security Council spokesman John Kirby declined to say Monday whether the U.S. had been or expects to be briefed on any Israeli response plans. “We will let the Israelis speak to that,” he said.

“We are not involved in their decision-making process about a potential response,” Kirby said.

U.S. Secretary of State Antony Blinken said the U.S. doesn't seek escalation but said it would continue to support Israel's security. He pledged to step up the diplomatic efforts against Iran.

“Strength and wisdom need to be different sides of the same coin,” he said.