The civilian, Arbel Yehud, should have been among the first two groups of hostages released on Jan. 19 and Jan. 25 under the cease-fire deal, according to the Israeli authorities.

Tens of thousands of Palestinians began returning to a ravaged northern Gaza and what was left of their homes and families, after Hamas agreed to release more hostages than expected this week to keep its cease-fire with Israel in place.

Tens of thousands of Palestinians streamed along the main roads leading north in Gaza on Monday after Hamas agreed to hand over three Israeli hostages later this week and Israeli forces began to withdraw from a main corridor across the enclave.