A key mediator on Tuesday stressed the urgency of brokering a ceasefire in the Gaza Strip after Hamas showed a “positive response” to a proposal from Arab countries, but Israel has yet to weigh in as its military prepares an offensive in some of the territory's most populated areas.

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.

Israel approved new settlements in the occupied West Bank, while its troops have reached the outskirts of Gaza City. The developments raise questions about the viability of a cease-fire proposal.