Two Palestinians, one of them a 16-year-old boy, have been killed and four wounded by an Israeli tank shell in the northern Gaza Strip. Ahmed Abu Qaida and Mervat Abu Sharekh, a 24-year-old woman, were killed Tuesday by the shell in the al-Nada area of the town of Beit Lahiya. Also Tuesday, a 15-year-old Palestinian girl, Sumaya Okal, died from injuries that she received from an Israeli tank shell in Jabaliya in northern Gaza on July 27. Full Story