Palestinian officials say an Israeli strike on a Gaza shelter has killed at least 27 people The Associated PressIsrael kills dozens in Gaza school attack, fires at UN positions in Lebanon Al Jazeera EnglishIsraeli strike kills at least 28 Palestinians at school in central Gaza, Red Crescent says CNNIDF strikes terror site in former Gaza school; Palestinians say 21 killed The Times of IsraelIsraeli strike on Gaza school-turned-shelter kills 28, medics say BBC.com