alks in Cairo aimed at securing a fresh ceasefire in Gaza are under renewed strain, with both sides in the conflict issuing warnings.
Palestinian negotiators said they would leave on Sunday if Israel did not attend without preconditions.
Israel insists it will not return until militant rocket fire ends.
Britain, France and Germany issued a statement calling on Israel and Hamas to agree a new truce, after last week's 72-hour ceasefire was not renewed.
That ceasefire ended on Friday morning. At least eight Palestinians were killed on Saturday as Israel launched 50 airstrikes, health officials said.
Israeli authorities said 25 rockets were fired from Gaza towards southern Israel.
At least 1,960 people have died since violence erupted in Gaza in early July.
More than 1,900 Palestinians, mostly civilians, have been killed, according to the UN.
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