JERUSALEM (AP) — Israel’s military told some 1 million Palestinians on Friday to evacuate northern Gaza and head to the southern part of the besieged territory, an unprecedented order applying to almost half the population ahead of an expected ground invasion against the ruling Hamas militant group.

Hamas, which staged a shocking and brutal attack on Israel nearly a week ago and has fired thousands of rockets since, dismissed it as a ploy and called on people to stay in their homes.

The evacuation order, which includes Gaza City, home to hundreds of thousands of Palestinians, sparked widespread panic among civilians and aid workers already running from Israeli airstrikes and contending with a total siege and a territory-wide blackout.

Israel has bombarded Gaza round-the-clock since a weekend attack in which Hamas fighters stormed into the country’s south and massacred hundreds, including killing children in their homes and young people at a music festival.

Egypt, which made peace with Israel decades ago and has long served as a regional mediator, is staunchly opposed to resettling Palestinians on its territory, both because of the costs involved and because it would undermine their quest for an independent state.

On Thursday, Israel said its complete siege of Gaza — which has left Palestinians desperate for food, fuel and medicine — would remain in place until Hamas militants free the hostages taken.

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