Israel and Iran continue to exchange attacks, fueling fears of a larger conflict.

Israel and Iran launched renewed attacks on each other early Sunday, fueling fears of a wider conflict after the Jewish state expanded its surprise campaign with an attack on the world's largest gas field.

Tehran suspended nuclear talks, which Washington said were the only way to stop the Israeli bombing, while Prime Minister Benjamin Netanyahu said the attacks were nothing compared to what Iran would see in the coming days.

The Israeli military said Iran had launched more missiles toward its territory late Saturday and was working to intercept them. It added that it was attacking military targets in Tehran.

Several projectiles were visible in the night sky over Jerusalem late Saturday. Air raid sirens did not sound in the city, but they did sound in Haifa, in northern Israel.

The Israeli ambulance service reported that a woman in her 20s was killed and 13 other people were injured after a missile struck a house in northern Israel.

Israeli media reported that three people had been killed in an attack in Tamra, a predominantly Palestinian town.

Iran said the Shahran oil depot in Tehran had been targeted by an Israeli attack but the situation was under control, and that a fire had broken out after an attack on a refinery near the capital.

Israeli strikes also hit the Iranian Defense Ministry building in Tehran, causing minor damage, Iran's Tasnim news agency reported Sunday.

The Iranian Revolutionary Guard stated that missiles and drones had attacked energy infrastructure and facilities producing fuel for Israeli fighter jets. It warned that the attacks would be "more extensive" if Israel continued its hostilities.

US President Donald Trump has warned Iran that much worse is coming. He said it was not too late to stop the Israeli campaign, but only if Tehran quickly agreed to a steep rollback of its nuclear program.

Host Oman confirmed that the next round of talks, scheduled for Sunday, had been canceled. Iranian Foreign Minister Abbas Araqchi stated that holding talks was unjustified while Israel's "barbaric" attacks continued.

In the first apparent attack on Iran's energy infrastructure, local media reported a fire on Saturday after Israel bombed the South Pars gas field in the southern province of Bushehr.

Netanyahu claimed that Israel's attacks had potentially set back Iran's nuclear program by years and rejected international calls for restraint.

"We will strike every location and every target of the ayatollahs' regime, and what you have felt so far is nothing compared to what you will receive in the coming days," he said in a video message.

Dozens dead

Iran said 78 people were killed on the first day and dozens more on the second, including 60 when a missile leveled a 14-story apartment building in Tehran, where 29 of the dead were children.

State television broadcast images of a building crushed by debris, the facade of several upper floors lying on its side in the street, while concrete slabs hung from a neighboring building.

"Smoke and dust filled the whole house and we couldn't breathe," Tehran resident Mohsen Salehi, 45, told Iran's WANA news agency after a nighttime airstrike woke his family.

Iran launched its own barrage of retaliatory missiles on Friday night, killing at least three people in Israel. Air raid sirens sent Israelis running for cover as waves of missiles streaked across the sky and interceptors scrambled to meet them.

Concerns about a potential disruption to the region's oil exports had already sent crude oil prices up as much as 9% on Friday, despite Israel's failure to disrupt Iran's oil and gas industry on the first day of the campaign.

Iranian General Esmail Kosari said Tehran was considering closing the Strait of Hormuz, which controls oil tanker access to the Gulf.

With Israel saying its operation could last weeks and urging the Iranian people to rise up against their Islamic clerical rulers, fears of a regional conflagration that could draw in outside powers have grown.

"If (Supreme Leader Ayatollah Ali) Khamenei continues firing missiles at the Israeli front, Tehran will burn," Israeli Defense Minister Israel Katz said.

Tehran warned Israel's allies that their military bases in the region would also be attacked if they helped shoot down Iranian missiles.

However, 20 months of war in Gaza and a conflict in Lebanon last year have decimated Tehran's strongest regional partners, Hamas in Gaza and Hezbollah in Lebanon, reducing its options for retaliation.

A military official said Saturday that Israel had caused significant damage to Iran's nuclear facilities at Natanz and Isfahan, but had so far not attacked another uranium enrichment site, Fordow, dug into a mountain.

The official claimed that Israel had "eliminated the highest ranks of its military leadership" and killed nine nuclear scientists who were "the main sources of knowledge, the main driving forces behind the (nuclear) program."

Tehran insists the program is entirely civilian and not seeking an atomic bomb. However, the UN nuclear watchdog denounced this week that it violates its obligations under the Non-Proliferation Treaty.