The delegation includes Israel’s spy chief David Barnea, head of the domestic security service Ronen Bar and the military’s hostages chief Nitzan Alon, a defence official said.
Hamas has voiced scepticism about the chances of the talks delivering real results, blaming Israel for stalling, while Israeli Prime Minister Benjamin Netanyahu says Hamas leader Yahya Sinwar has been the main obstacle to sealing a deal.
“Going to new negotiations allows the occupation to impose new conditions and employ the maze of negotiation to conduct more massacres,” senior Hamas official Sami Abu Zuhri told Reuters.
However, Hamas’ absence from the talks does not eliminate the chances of progress since its chief negotiator Khalil al-Hayya is based in Doha and the group has open channels with Egypt and Qatar.
“Hamas is committed to the proposal presented to it on July 2, which is based on the UN Security Council resolution and the Biden speech, and the movement is prepared to immediately begin discussion over a mechanism to implement it,” Abu Zuhri said.
A source familiar with the matter said Hamas wants the mediators to come back to them with a “serious response” from Israel.
If that happens, the group says, it will meet with mediators after the Thursday session.
An official briefed on the talks process said mediators expected to consult with Hamas.
Amos Hochstein, a senior adviser to US President Joe Biden, was in Lebanon to deter a separate escalation between Hezbollah and Israel, after the latter killed a senior Hezbollah commander in Beirut’s southern suburbs last month.
Hochstein met parliament speaker Nabih Berri, who heads the armed Amal movement, which is allied to Hezbollah and has also fired rockets on Israel and will meet Lebanese caretaker Prime Minister Najib Mikati.
“There is no more time to waste and there’s no more valid excuses from any party for any further delay,” the US envoy told a news conference.
In the Gaza Strip, residents of the southern city of Khan Younis said Israeli forces blew up homes in the east and intensified tank shelling on eastern areas of the city centre.
Israel said it was responding to Hamas rocket fire towards Tel Aviv on Tuesday and had struck rocket launching pads and militants among 40 military targets over 24 hours, including in central Gaza, Khan Younis and western Rafah in the south.
Armed wings of Hamas and Islamic Jihad said they had attacked Israeli forces in several areas, while Palestinian health officials said Israeli strikes had killed at least 27 people so far on Wednesday, mostly in the centre and south.
Hamas also said its fighters were engaged in fierce clashes with Israeli forces in the Israeli-occupied West Bank, where Israel said it had killed a number of militants.
A Hamas-led attack on Israeli communities around the Gaza Strip on October 7 killed about 1200 people, mostly civilians, with more than 250 taken hostage to Gaza, according to Israeli tallies.
In response, Israeli forces have razed much of Gaza, displaced most of the population, and killed around 40,000 people, most of them civilians, according to the Palestinian health ministry.
Israel has lost more than 300 soldiers and says about a third of the Palestinian fatalities in Gaza have been fighters.