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 CNNMiddle East latest: Dozens killed as Israeli troops pound central and northern Gaza The Associated PressIsraeli strike on Gaza school-turned-shelter kills 28, medics say BBC.com