Israeli airstrikes hit a school and a hospital in central Gaza on Saturday as the country’s negotiators prepared to meet international mediators to discuss a proposed cease-fire.At least 30 people sheltering at a girls’ school in Deir Al-Balah were taken to Al Aqsa Hospital and pronounced dead after a strike that Israel’s military said targeted a Hamas command and control center used to store weapons and plan attacks.Gaza’s Health Ministry said 11 people were killed in other strikes on Saturday.