JERUSALEM, Aug. 19 (Xinhua) -- A senior Israeli official said on Tuesday Israel is demanding the release of all hostages still held in Gaza, a day after Hamas announced it had accepted a ceasefire-for-hostage proposal brokered by Qatar and Egypt.

The official, who spoke on condition of anonymity, did not explicitly reject the plan but said Israel "demands the release of all 50 hostages in accordance with the principles set by the cabinet for ending the war."

"Israel's policy is consistent and has not changed. We are in the final stage of defeating Hamas and will not leave any hostages behind," the official said.

Palestinian sources said the proposal envisions a prisoner swap under which 10 Israeli hostages would be freed in exchange for 200 Palestinian prisoners. It also calls for immediate humanitarian relief, including fuel, water and electricity, as well as support for hospitals, bakeries and rescue teams.

Prime Minister Benjamin Netanyahu said last week his Security Cabinet had agreed the war would end only if five conditions were met: Hamas's disarmament, the release of hostages, Gaza's demilitarization, continued Israeli security control, and the appointment of a non-Israeli administration to run daily affairs in the enclave.

Israel's 22-month offensive in Gaza has killed more than 62,000 people and triggered famine conditions that have claimed dozens of lives, according to Gaza health authorities. ■