At least 15 Palestinians, including 10 children, have been killed in an Israeli strike while queuing for nutritional supplements outside a medical clinic in central Gaza. US-based aid group Project Hope, which runs the clinic, said the attack was a blatant violation of international law. The Israeli military said it struck a "Hamas terrorist" and regretted any harm to civilians. The victims were among 66 people reportedly killed in Israeli strikes on the same day. Project Hope said the attack