France, Germany and Britain meanwhile said Israel's seven-week blockade on all imports to Gaza was "intolerable."

DEIR AL-BALAH, Gaza Strip — An overnight Israeli strike on a school-turned-shelter in Gaza City killed 23 people, as Arab mediators worked on a proposal to end the war with Hamas that would include a five-to-seven-year truce and the release of all remaining hostages, officials said Wednesday.

The Israeli army killed at least 24 Palestinians in fresh strikes targeting homes and tents across the Gaza Strip on Monday as it continued its deadly assault on the enclave, medics said. Five people were killed and several others injured when fighter jets struck a tent for displaced people in central Gaza City, said a medical source.