An image of Hadar Goldin, an Israeli soldier killed in 2014 whose body has been held in Gaza since then, is shown during a rally calling for the return of the deceased captives in Tel Aviv, Israel. AP
Israeli forensic experts are expected to determine the identity of the remains once they are received.
"The (Ezzedine) Al-Qassam Brigades will deliver the body of officer Hadar Goldin, which was found yesterday in a tunnel in the city of Rafah, at 2:00 pm (1200 GMT) Gaza time," the group said in a statement on its Telegram channel.
If confirmed, Goldin would be the 24th deceased captive whose remains Hamas has returned since the start of the current ceasefire on October 10.
Goldin's body has been held in Gaza since his death in 2014.
Israeli media reported on Saturday that Israel had allowed Hamas and Red Cross personnel to search in an area under Israeli control in Rafah to locate Goldin's remains.
Several outlets said Hamas recovered the remains in a tunnel beneath territory held by Israeli forces.
Shortly after those reports, Israel's military chief Lieutenant General Eyal Zamir visited the Goldin family, pledging to bring home his remains and those of other dead captives still held in Gaza.
"The chief of the general staff emphasised his commitment and the army's commitment to bringing back Hadar and all the fallen hostages," the military said in a statement.
Another Israeli soldier, Oron Shaul, was also killed in the six-week war in 2014.
His body was recovered earlier this year during the latest war.
Efforts to secure the return of both soldiers' remains in past prisoner swaps had repeatedly failed.
Goldin, 23, was part of an Israeli unit tasked with locating and destroying Hamas tunnels when he was killed on August 1, 2014, just hours after a 72-hour humanitarian ceasefire took effect.
The army said militants ambushed his team, killing him and seizing his body.
Israel listed Goldin among the deceased captives whose remains it seeks to repatriate under the ongoing US-brokered ceasefire deal to end the latest Gaza war.
At the start of the truce, Hamas was holding 20 living captives and 28 bodies of the deceased .
It has since released all the living captives and returned 23 of the deceased's remains in line with the ceasefire terms.
In exchange, Israel has released nearly 2,000 Palestinian prisoners in its custody and returned the bodies of hundreds of Palestinians.
Apart from Goldin, four captives bodies -- three Israeli and one Thai -- remain to be returned from Gaza, all of them seized during the October 2023 attack.
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