As daylight broke on Sunday, the scale of the damage in the desert town of Arad, where one of the strikes hit a multi-story apartment bloc, came into clearer view, with entire floors blown open by the blast.
Uri Shacham, the chief of staff of Israel's ambulance service, said at least eight buildings were damaged by the missile, which left a crater not far from the apartment blocks.
Footage verified by Reuters showed flames engulfing the top floor of an apartment building shortly after the strike. Search and rescue teams moved from floor to floor inside the damaged buildings.
Israeli military spokesperson Lieutenant Colonel Nadav Shoshani said both strikes had been carried out with conventional ballistic missiles. He declined to comment when asked about the initial findings of a military investigation into the failure to intercept the missiles.
Most Israelis receive alerts on their mobile phone when launches from Iran are identified. An air raid siren sounds and they then have a few minutes to go to safe rooms or public bomb shelters.
"It is a miracle that no-one was killed," Israeli Prime minister Benjamin Netanyahu said on Sunday, standing in the crater at the impact site in Arad.
Pointing at the blown out walls of the apartment bloc and then at the enforced undamaged wall leading to a shelter below ground, Netanyahu urged Israelis not to be complacent. No one would have been hurt, he said, had all sought shelter in time.
In Arad, 31 people, including 18 children, were hospitalised, at least nine of them in serious condition, according to the hospital. Dozens more were lightly injured.
Israel said Iran was targeting civilian population areas. Iran's Revolutionary Guards said they targeted military and security-related sites in retaliation for Israeli strikes against Iranian sites.
Arad and Dimona, another city that was hit, are located close to Israel's secretive nuclear reactor and several military bases, including Nevatim Air Base, one of the country's largest.
In Dimona, five people were hospitalised, including a 12-year-old boy in serious condition, the hospital said.
Since joint US-Israeli strikes on Iran on February 28, Israel has come under daily missile fire from Iran. At least 20 civilians have been killed in Israel and the Palestinian territories, including one Israeli killed in an attack by Iran-backed Lebanese group Hezbollah on Sunday.
At least 15 people were hospitalised on Sunday in fresh Iranian attacks, according to emergency services, including a cluster munition that struck in Tel Aviv.
Israeli and US strikes have killed at least 1300 people in Iran so far, according to the Iranian government. The US-based rights group HRANA, which tracks human rights violations in Iran, has recorded 3320 people killed, including 1406 civilians and 1167 military personnel, with the remainder not yet determined. Reuters could not independently verify the data.
