Israel has ordered hundreds of thousands of people to evacuate the city and go to the southern Gaza Strip, but many residents say it is no safer for them there.
The Israeli military issued evacuation orders for residents in the high-rise towers and urged Palestinians to move to the south of Gaza, as it intensifies its offensive on the city.
The Israeli military destroyed a landmark building after saying it had taken control of almost half of the city, where hundreds of thousands of civilians are sheltering amid a worsening humanitarian crisis.
An Israeli strike hit the Mushtaha Tower in Gaza City on Friday. The Israeli military said Hamas used the building for intelligence-gathering, but Hamas denied the accusation.