The European Union's top diplomat called Sunday for an end to the renewed fighting in Gaza during a stop in Egypt, before setting off for Israel and the Palestinian territories to press for resumption of a Gaza truce.
Israel on Tuesday resumed intense air strikes in the Gaza Strip, followed by ground operations, after negotiations with Hamas militants stalled over the next stage in the ceasefire.
"We strongly oppose Israel's resumption of hostilities, which caused appalling loss of life in Gaza. The killing must stop. In a new war, both sides lose," the EU's Kaja Kallas said in Cairo during a press conference with Egyptian Foreign Minister Badr Abdelatty.
"From the European side, it is very clear that Hamas must release all hostages and Israel must fully reinstate humanitarian aid into Gaza and negotiations must resume."
Kallas' team later confirmed she had departed Egypt and arrived in Israel.
During talks there and the Palestinian territories on Monday she is expected to "call for an immediate return to the full implementation of the ceasefire-hostage release agreement", her office said.
Kallas will also refer to "the importance of unimpeded access and sustained distribution of humanitarian assistance at scale into and throughout Gaza," it said.
The United Nations said on Friday that Gaza was facing a "nightmare" since Israel resumed military operations after a six-week ceasefire.
Aid workers warned of a desperate situation that had been made worse by Israel's decision earlier this month to cut off aid and electricity to Gaza over the deadlock in negotiations on the next phase of the ceasefire.
Kallas was due to meet Israeli President Isaac Herzog, Foreign Minister Gideon Saar and opposition leader Yair Lapid.
She will not meet Prime Minister Benjamin Netanyahu, for whom the International Criminal Court has issued an arrest warrant "for crimes against humanity and war crimes".
In the occupied West Bank, Kallas will hold talks with Palestinian Authority president Mahmud Abbas and prime minister Mohammad Mustafa, her office said.
Israel and the United States have sought in recent weeks to change the terms of the ceasefire deal.
Hamas, which runs Gaza, has rejected this as a violation of the agreement all parties signed.
The first phase of the truce had enabled the entry of vital food, shelter and medical assistance, and an exchange of Israeli hostages for Palestinians held in Israeli jails.
On October 7, 2023, fighters from Hamas launched a cross-border attack in Israel that resulted in the deaths of more than 1,200 people, most of them civilians, according to Israeli figures.
Israel's ensuing bombardment and ground offensive in Gaza has killed at least 50,021 people in the territory, the Gaza health ministry said on Sunday.
The United Nations considers its figures to be reliable.
