Israel is studying Hamas' response to a proposal for a 60-day ceasefire and release of half the hostages still held in Gaza, two Israeli officials said, although one source reiterated that all Israeli captives must be freed for the war to end.

JERUSALEM (AP) — A key mediator on Tuesday stressed the urgency of brokering a ceasefire in Gaza after Hamas showed a “positive response” to a proposal, but Israel has yet to weigh in as its military prepares an offensive on some of the territory’s most populated areas.

It was unclear whether Prime Minister Benjamin Netanyahu of Israel was on board with the terms, which came as Qatar and Egypt were intensifying mediation efforts.