, May 9 -- The World Health Organization says it has only three days of fuel for its medical operations in southern Gaza, with shortages already forcing one of three remaining hospitals in the city of Rafah to shut down.

The Rafah border crossing with Egypt has been closed since Israel's military took control of the Palestinian side early Tuesday, blocking the entry of desperately needed humanitarian aid. The U.N. says northern Gaza is already in a state of "full-blown famine."

Israel said it reopened Kerem Shalom crossing, the other main entry point for aid, on Wednesday. U.N. officials say no aid has entered Gaza, and there is no one to receive it on the Palestinian side because of ongoing fighting.

The war in Gaza has driven around ...