An estimated 50,000 people fled the north of Gaza through a “corridor” opened by the Israeli military Wednesday, according to the U.N. humanitarian affairs agency, as Israeli ground troops pushed deep into Gaza City and clashed with Hamas militants. The Group of Seven nations, which includes the United States, called for “unimpeded humanitarian support for civilians,” including corridors and pauses in fighting. Speaking after their meeting, Secretary of State Antony Blinken said Israel should not reoccupy Gaza, following a comment from Israeli Prime Minister Benjamin Netanyahu that Israel would assume responsibility for Gaza’s security “for an indefinite period.”