At least 10 people were killed in an air strike near the municipality building in Deir Al-Balah in the central Gaza Strip where people gathered to receive aid, medics said on Saturday.
Casualties were being carried by foot, on rickshaws and private cars from the site of the attack to the hospital, medics said.
The strike killed the head of the Hamas-run administrative committee in central Gaza, a Hamas source said.
The Israeli military was looking into the report, a spokesperson said.
Israel's offensive has displaced almost the entire Palestinian population. (AP PHOTO)
Earlier, Israeli aircraft struck militants and weapon caches near an aid warehouse, the military said, after gunmen had fired rockets into Israel from there.
A separate strike in Gaza City on a former shelter housing displaced people targeted Hamas fighters, the military said.
At least seven people were killed in that attack, Palestinian medics said, including a woman and her baby.
It was unclear whether any of the other people killed were fighters.
The military said it had taken precautions to reduce risk of harm to civilians.
A separate strike in Gaza City killed a local journalist, medics said.
The military was looking into the report, a spokesperson said.
The war in Gaza began when the Palestinian militant group Hamas stormed into Israel on October 7, 2023, killing 1200, mostly civilians, people and taking more than 250 hostages back to Gaza, according to Israeli authorities.
Israel then launched an air, sea and land offensive that has killed at least 44,000 people, mostly civilians, according to authorities in the Hamas-run Gaza Strip, displaced nearly the entire population and left much of the enclave in ruins.
A fresh bid by Egypt, Qatar and the United States to reach a truce has gained momentum in recent weeks.
Egyptian President Abdel Fattah al-Sisi on Saturday discussed with visiting US officials efforts to reach a ceasefire in Gaza and a hostages-for prisoners deal in the Palestinian enclave, Sisi's office said.