Israeli airstrikes killed at least 38 Palestinians in Gaza, hospital officials told the Associated Press on Sunday, as Israel's military said it has struck over 100 targets in the embattled enclave in the past day.

Palestinians reported one of the worst nights of Israeli bombardment in weeks, while Israeli officials were due in Washington for a new ceasefire push.

Israel will send a delegation to Qatar on Sunday for talks on a possible Gaza hostage and ceasefire deal, although Prime Minister Benjamin Netanyahu's office said the changes requested by Hamas to a ceasefire proposal were unacceptable.