https://www.bbc.co.uk/news/world-middle-east-67814475The Israeli military has vowed to continue its operation in Gaza, but admitted it is "protracted" and "difficult".
A spokesman said over the weekend it was expanding its "ground operations in the southern and northern Gaza Strip".
Meanwhile, the US said Joe Biden spoke to the Israeli PM and emphasised the "critical need" to protect civilians.
In response, Benjamin Netanyahu said the war would go on until all Israeli goals were achieved.
President Biden also told reporters that he had not asked Mr Netanyahu for a ceasefire.
On Friday, the UN Security Council approved a resolution demanding large-scale aid deliveries to Gaza - but stopped short of calling for a ceasefire between the two warring sides.
Talks held in Egypt earlier this week designed to secure a fresh truce between Israel and Hamas have so far failed to deliver results.
A Palestinian official familiar with the ceasefire negotiations has told the BBC that Egypt presented a new three-stage plan that begins with a two-week humanitarian truce which could be extended, during which Hamas releases 40 hostages and Israel releases 120 Palestinian prisoners.