Israeli strikes have killed at least 73 people, including women and children, in the city of Beit Lahia in northern Gaza, the strip's Hamas-run authorities say.
Dozens of others are injured and many are still trapped under the rubble after the bombing late on Saturday night, officials added.
Israel said it was checking reports of casualties but said the figures published by Hamas authorities were "exaggerated" and did not match information held by its military.
The latest strikes come just hours after reports of "heavy gunfire" from Israeli troops at the Indonesian Hospital in the city.
Rescue efforts in Beit Lahia are currently hampered due to communications and internet services being severed in the region, Gaza health officials said.
The Hamas-run government media office said the bombing hit "crowded" residential areas, and that 73 people had been killed - a number also reported by Gaza's civil defence agency. The BBC cannot independently verify the figures.
According to Palestinian news agency Wafa, an entire residential complex was destroyed in the strikes.
TVNL Comment: Damn the Israelis. These people are not combatants. Women and babies are beeing killed. Hospitals are being targeted. Just damn them.
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