Israeli forces say they have raided the central Hamas headquarters in the city of Khan Younis in southern Gaza. They say they found the office of the brother of Yahya Sinwar, the Hamas chief in the Gaza Strip.
The forces posted the announcement on Sunday as US Secretary of State Antony Blinken was heading to the Middle East to negotiate a pause in the Israel-Hamas conflict and the release of hostages.
The footage released by the forces shows Israeli troops storming what they say is the office of Muhammad Sinwar, the younger brother of Yahya Sinwar.
The troops fired their guns as they entered what they called his office and searched inside.
They say they found a training area, which contained simulations of Israeli forces' bases. The footage also shows outdoor stockpiles of guns and ammunition, as well as missiles.
Blinken is scheduled to visit Israel, the West Bank, Qatar, Egypt and Saudi Arabia through Thursday. This will be his fifth visit to the region since the fighting began between Israel and Hamas last October.
But US National Security Advisor Jake Sullivan said in an interview with ABC News on Sunday that he cannot say a deal for a pause and the release of hostages "is right around the corner."
Blinken is also expected to try to curb the rise of tensions in the region after the US launched retaliatory strikes for a drone attack on a US outpost in Jordan that killed three American soldiers.