JERUSALEM (AP) — Israel said Friday it plans to take over Gaza City — in what would be an escalation of its 22-month war with Hamas that drew a dismissal from the militant group, renewed international calls to end the conflict, and stirred fears for hostages still held in Gaza.

It may also reflect the reservations of Israel’s military chief of staff, Lt. Gen. Eyal Zamir, who reportedly warned that expanding operations would endanger the remaining 20 or so living hostages held by Hamas and further strain Israel’s army after nearly two years of regional wars.

Members of the UN Security Council offered their sympathy to Israeli hostages after a video showing an emaciated captive was released by Hamas, but called on Israel to end its self-created humanitarian catastrophe and allow more aid to enter the besieged territory.