DEIR AL-BALAH, Gaza Strip — Israel’s war with Hamas erupted again Friday, as airstrikes hit houses and buildings in the Gaza Strip minutes after a weeklong truce expired. Health authorities in the besieged territory reported dozens of Palestinians killed and Israel dropped leaflets over Gaza City and southern parts of the enclave, urging civilians to flee to avoid the fighting.

       fighters in Gaza resumed firing rockets into Israel, and fighting broke out between Israel and Hezbollah fighters operating along its northern border with Lebanon.

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       The resumption of the war threatens to compound the suffering in Gaza. Some 2 million people -- almost its entire population -- are crammed into the territory’s south, where Israel urged people to relocate at the war’s start and has since vowed to extend its ground assault. Unable to go into north Gaza or neighboring Egypt, their only escape is to move around within the 85-square-mile area.