The Israeli military used a 500lb (230kg) bomb, a powerful and indiscriminate weapon that generates a massive blast wave and scatters shrapnel over a wide area, when it attacked a target in a crowded beachfront cafe in Gaza on Monday. Between 24 and 36 Palestinians were killed in the attack on the cafe and dozens more were injured. The dead included a well-known film-maker and an artist. Experts in international law said the use of such a munition despite the known presence of many unprotected civilians, including children, women and elderly people, was almost certainly unlawful and may constitute a war crime. Fragments of the weapon from the ruins of al-Baqa cafe have been identified by ordnance experts as parts of an MK-82 general purpose 230kg bomb, a powerful US-made bomb. An IDF spokesperson said the attack on the cafe was under review and that "prior to the strike, steps were taken to mitigate the risk of harming civilians using aerial surveillance."