UK Foreign Secretary David Cameron said "over half of Gaza's population are sheltering in the area", while Dutch FM Hanke Bruins Slot said there could be "many civilian casualties".

On Sunday the Hamas-run health ministry in Gaza said 112 more Palestinians had been killed by the Israeli military over the previous day, bringing the overall death toll to more than 28,100 and more than 67,500 injured.

Saturday's warnings came a day after Israeli Prime Minister Benjamin Netanyahu ordered his military to prepare to evacuate civilians from the city ahead of an expanded offensive against Hamas.

UN humanitarian co-ordinator Jamie McGoldrick, who has just been to Gaza to assess the situation, told the BBC's Barbara Plett Usher that people in Rafah would have "nowhere to go" if Israeli troops launched their offensive.

Also on Saturday, the Saudi foreign ministry issued a statement that warned against "targeting the city of Rafah in the Gaza Strip, which is the last resort for hundreds of thousands of civilians forced by the brutal Israeli aggression to flee".

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