US President Joe Biden has pressed Israeli Prime Minister Benjamin Netanyahu on the urgency of sealing a deal for a truce in Gaza and the release of hostages, the White House said, but Israel and Hamas stuck firmly to their demands, Reuters reports.

The call between the leaders, in which Vice President Kamala Harris also took part, came after Palestinian health officials reported at least 50 Palestinians killed by Israeli airstrikes over a 24-hour period.

Biden stressed to Netanyahu “the urgency of bringing the ceasefire and hostage release deal to closure and discussed upcoming talks in Cairo to remove any remaining obstacles,” a White House statement said.

US, Israeli, Egyptian and Qatari negotiators, who are expected to meet in Cairo this weekend, have for months struggled to bridge differences between Israel and Hamas.

But Israel and Hamas on Wednesday held to their demands.