Dwindling food and fuel stocks could force aid operations to grind to a halt within days in Gaza as vital crossings remain shut, forcing hospitals to close down and leading to more malnutrition, United Nations aid agencies warned on Friday. Humanitarian workers have sounded the alarm this week over the closure of the Rafah and Kerem Shalom crossings for aid and people as part of Israel's military operation in Rafah, where around 1 million uprooted people have been sheltering. The Israeli military said a limited operation in Rafah was meant to kill fighters and dismantle infrastructure used by Hamas, which governs the besieged Palestinian territory.