The EU’s top diplomat, Josep Borrell, has said he is “horrified” after an Israeli airstrike hit a school sheltering residents in Gaza on Saturday, which Palestinian authorities said killed up to 100 people. “At least 10 schools were targeted in the last weeks. There’s no justification for these massacres,” he wrote on X. “We are dismayed by the terrible overall death toll,” he added, saying that more than 40,000 Palestinians have been killed since the war began in October. The Palestinian health ministry, which is controlled by the militant Islamist group Hamas, puts the death toll in Gaza at …