Israeli forces have blown up more residential buildings in Gaza City, killing at least 31 Palestinians and prompting many others to flee, Gazan health authorities say, as Israel's tanks push further into the densely populated city.

Almost two years into the war, Israel describes Gaza City as the last bastion of Hamas and the military has been demolishing housing blocks it says were being used by the militant group since launching its ground assault in the city earlier in September.

A pregnant woman and her two children were among those killed on Sunday, medics said.

The Israeli military did not immediately comment on the deaths, issuing a statement saying its forces had killed "numerous" militants.

Relatives sifted through the rubble of one of the apartment buildings that was hit in Ga

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