JERUSALEM — The Israeli military said Wednesday that it has reopened its Kerem Shalom crossing into Gaza after days of closure, but the U.N. said no humanitarian aid has yet entered and there is no one to receive it on the Palestinian side after workers fled during Israel’s military incursion in the area. [time-brightcove not-tgx=”true”] The Kerem Shalom crossing between Gaza and Israel was closed over the weekend after a Hamas rocket attack killed four Israeli soldiers nearby, and on Tuesday, an Israeli tank brigade seized the nearby Rafah crossing between Gaza and Egypt, forcing its closure.