A 13-story residential tower in the Gaza Strip was hit by an Israeli airstrike on Tuesday night and soon after collapsed to the ground, witnesses said, amid a surge of fighting between Israel and Gaza militants.
The tower houses an office that is used by the political leadership of Gaza's Islamist rulers Hamas.
Residents of the tower and people living nearby had been warned to evacuate the area around an hour before the airstrike, witnesses said. It was not immediately clear if the building had been fully evacuated, or if there were casualties.