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- Israel said on Tuesday that it had sent tanks into Rafah in defiance of US warnings.
- The Biden administration says its concerned about the lives of hostages and civilians.
- The attack signals a widening rift between the US and Israel over actions in Gaza.
Early on Tuesday, Israeli tanks seized control of the vital Rafah border crossing between Gaza and Egypt.
It came after the Israeli military launched a series of overnight strikes on the city as international mediators attempted to hash out a cease-fire agreement between Israel and Hamas.