RAFAH, Gaza Strip (AP) — Hamas on Monday released two elderly Israeli women held hostage in Gaza as the United States expressed increasing concern that the escalating Israel-Hamas war will spark a wider conflict in the region, including attacks on American troops.

The death toll in Gaza rose rapidly as Israel ramped up airstrikes that flattened buildings in what it said was preparation for an eventual ground assault. The United States advised Israel to delay the expected invasion to allow time to negotiate the release of more hostages taken by Hamas during its brutal incursion two weeks ago.

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