Hamas announced it has returned all the Israeli hostage remains it has been able to recover, but extensive efforts and special equipment are still needed to locate the rest.

The Red Cross transferred two more coffins to Israel, where they are being sent to the National Centre for Forensic Medicine for identification.

Under the Gaza peace plan, Hamas was to return 20 living hostages and 28 deceased by October 13; while the living hostages were returned, the remains of at least 19 deceased are still unaccounted for.

U.S. advisers noted the destruction in Gaza makes retrieval difficult, with Israel sharing intelligence and Turkey offering expert teams to assist, CBS News has reported.

The broader peace plan faces further hurdles, as Hamas refuses to disarm, while Israel insists on demilitarization and disarmament as conditions for compliance and ongoing negotiations.