At least 26 Palestinians have been killed in Gaza in the deadliest single Israeli attack since the airstrikes began.
Rescuers are desperately trying to pull people out of the rubble. At least 50 people are injured.
So far on Sunday, multiple Israeli airstrikes have killed at least 33 Palestinians in Gaza.
In the occupied West Bank, at least 15 Palestinians have been killed by Israeli troops since Friday.
More than 500 were injured when the Israeli army fired live bullets and tear gas at protesters.