The head of Hamas was due in Egypt on Wednesday for talks on a fresh ceasefire in Gaza, after Israel said it was willing to agree to another pause in exchange for more hostages.

International pressure is mounting for a new truce that could ramp up aid to the besieged Palestinian territory, with the United Nations due to vote Wednesday on calling for a ceasefire.

Qatar-based Hamas chief Ismail Haniyeh was expected to lead a "high-level" delegation to Egypt for talks with the country's spy chief and others on "stopping the aggression and the war to prepare an agreement for the release of prisoners", a source close to the group told the media.

Israel's leaders are facing growing calls to secure the release of 129 hostages they say are being held in Gaza and, on Tuesday, signalled a willingness to return to the negotiating table with Hamas.

Israeli President Issac Herzog said his country was "ready for another humanitarian pause and additional humanitarian aid in order to enable the release of hostages".

Israeli Prime Minister Benjamin Netanyahu said he had recently sent his spy chief on two trips to Europe in an effort to "free our hostages".

Demonstrators march at a rally calling for a permanent cease-fire in Gaza in Boston, Massachusetts, US. Reuters

US news site Axios reported Monday that David Barnea, head of the Israeli intelligence agency Mossad, met with Qatari Prime Minister Sheikh Mohammed bin Abdulrahman Al Thani and CIA director Bill Burns in Europe to discuss a potential new deal to free hostages.

Qatar, backed by Egypt and the United States, helped broker a week-long truce and hostage-prisoner swap in November in which 80 Israeli hostages were freed in exchange for 240 Palestinian prisoners.

Agence France-Presse