Israel had withdrawn most of its forces before US President Barack Obama was inaugurated on Tuesday, in a move analysts saw as an attempt not to cloud the start of a new era in a key alliance.
Hamas, announcing a ceasefire on Sunday hours after an Israeli-declared truce went into effect, had demanded Israeli troops quit the territory within a week.
Israeli attacks in a 22-day Gaza offensive killed 1,300 Palestinians and made thousands homeless. Gaza medical officials said the Palestinian dead included at least 700 civilians.
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