a case that has galvanized Palestinian national sentiment, setting the stage for the renewed conflict in Gaza.

The weekend’s rocket fire by Hamas and other Islamist militant groups in Gaza included a major barrage over central Israel early Sunday morning.

Most of those rockets were intercepted by the Iron Dome, an antimissile detection system partly financed by the United States. But where they hit, they brought terror on Israeli residents, particularly in towns like Sderot, close to Gaza’s perimeter.

One blast this weekend destroyed a fifth-floor apartment in Sderot, killing a 5-year-old boy, and ripped a hole in another, where Eli Botera, his wife, Gitit, and their infant daughter, Adele, were huddling in the baby’s bedroom.

“My wife was panicking and started to scream,” Mr. Botera said. “Eventually, it’s all up to God. Every individual must do what they can to protect themselves, but if it’s your destiny to die, you die.”

The deadliest attacks have been in Gaza — and chief among them was the airstrike on Ms. Abul Ouf’s home in Al-Wehda, a busy, wealthy district in Gaza City, full of shops and apartment blocks.

Ms. Abul Ouf was training to be a dentist and lived at home with her parents and siblings, relatives said. By Sunday morning, two were dead and three had been plucked injured from the rubble, relatives said. Ms. Abul Ouf’s father, a supermarket owner, was unscathed, having gone for a nighttime visit to fix a neighbor’s internet.

Ms. Abul Ouf was due to marry Mr. al-Yazji in two months. They last spoke early Sunday as the bombardment began, Mr. al-Yazji said.

“Hide,” he remembered telling her in a text message.

But the message never arrived.

Mr. al-Yazji spent hours on Sunday scouring the rubble for her. Government rescuers heaved away debris, stone by stone, and when they spotted a body, Mr. al-Yazji hurried over, the rubble’s grit and sand caking his feet.

The person was still breathing. But it wasn’t Ms. Abul Ouf.

The Israeli bombardment has forced 38,000 people to seek sanctuary in dozens of U.N. schools, the United Nations said. Gaza now faces power failures at least 16 hours a day, while damage to a desalination plant has threatened the access of about 250,000 people to drinking water, the United Nations said.

Israel’s airstrikes have also stopped all Covid-19 vaccinations and virus testing in the Palestinian enclave and raised the risk of viral contagion as civilians cram into shelters for safety, U.N. officials said.

Standing in the rubble Sunday, Mr. al-Yazji gave up hope of finding his fiancée by the midafternoon. He took a box of her dental equipment from the ruins, a small token to remember her by. Then he left with his brother for the nearby hospital where casualties from the airstrike were being taken.

After every new ambulance arrived, he rushed to its back doors to peer inside and see if Ms. Abul Ouf was lying within. Each time, he walked back disappointed.

After several hours, he went instead to the morgue. And there, lying motionless on a stand, was the body of Shaimaa Abul Ouf.

Mr. al-Yazji emerged hysterical with grief. “Be happy,” he said after identifying her body.

“I swear to God,” he added, “she was laughing.”

Reporting was contributed by Isabel Kershner from Sderot, Israel; Lara Jakes from Washington; Rick Gladstone from New York; Gabby Sobelman from Rehovot, Israel; and Adam Rasgon from Tel Aviv.

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