At least 15 Palestinians, including 10 children, have been killed in an Israeli strike while waiting 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 in front of its Altayara health clinic in Deir al-Balah happened as patients gathered outside, waiting to receive treatment for malnutrition, infections and chronic illnesses. Graphic footage posted on social media, which was verified by the BBC, showed the immediate aftermath of the attack, with adults and young children lying in a street, some severely wounded and others not moving.