Investigators allege he planned the attack for a year and was driven by a desire "to kill all Zionist people."
Many Palestinians said they found their old neighborhoods unrecognizable from the relentless fighting that reduced most of the buildings to rubble.
The Israeli military said Wednesday that one of the bodies handed over by Hamas the previous day as part of the ceasefire deal is not that of a hostage who was held in Gaza.
Humanitarian workers said they will face many challenges delivering aid to Gaza including border restrictions and trying to access destroyed roads.
While President Donald Trump has declared the Israel-Hamas war over, some Middle East experts say the process to end the two-year conflict is just beginning.
Responding to a question about reports of Hamas rearming themselves, Trump said that "we gave them approval for a period of time."