Few details about the disarmament agreement were initially released and there was no immediate word from Israeli officials or Hamas on the president's announcement.
President Donald Trump on Thursday warned Hamas "we will have no choice but to go in and kill them" if internal bloodshed persists in Gaza.
President Trump said his focus now is on rebuilding Gaza, but has shared few specifics on his vision for security and governance of the enclave.
U.S. President Donald Trump expressed concern in a social media post that too few of the dead hostages have been returned.
All 20 living hostages held by Hamas and hundreds of Palestinian prisoners held by Israel walked free Monday as part of a ceasefire pausing two years of war that decimated the Gaza Strip and killed tens of thousands of Palestinians.
Responding to a question about reports of Hamas rearming themselves, Trump said that "we gave them approval for a period of time."