Israeli Prime Minister Benjamin Netanyahu has ordered the military to prepare to evacuate civilians from the southern Gazan city of Rafah ahead of an expanded offensive against Hamas.
Some 1.5 million Palestinians are in Rafah seeking refuge from Israeli combat operations in the rest of Gaza.
It comes a day after the US warned Israel that an unplanned invasion of Rafah would be a disaster.
Aid groups say it is not possible to evacuate everyone from the city.
Mr. Netanyahu told military and security officials to "submit to the cabinet a combined plan for evacuating the population and destroying the battalions" of Hamas.