https://www.bbc.com/news/world-middle-east-57131272How heavy were the overnight bombardments?
Israel's military said it had struck the homes of both Yahya Sinwar and his brother Muhammad Sinwar, whom it described as head of logistics and manpower for Hamas.
Both residences had, it said, "served as military infrastructure" for Hamas.
Local sources confirmed for media that the Hamas leader's home had been bombed. There were no immediate reports about the fate of the two brothers.
Multiple air strikes rocked Gaza City during the night, with dozens of people reported missing under the rubble of homes, the BBC's Rushdi Abualouf said.
"I have never covered air strikes with such intensity, explosions are everywhere in Gaza, there are difficulties in communicating with officials to find out where the strikes are," he said on Twitter.
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"The building in which I live in [the] western part of the city shook like an earthquake," he said. "A hysterical state of chaos, children and women in the building that houses more than 200 people screaming."
This girl was rescued from rubble in Gaza City on Sunday.