A school which was converted to a residential building in the Ketu area of Lagos partially collapsed on Sunday.
There are over 800 rooms in building which is widely known as Agboye Estate on Oduntan Street.
It first caved in on Saturday afternoon following hours of rainfall.
As residents were still trying to salvage their belongings on Sunday afternoon, the building crumbled again, destroying another structure inside the compound before collapsing completely.
The development sent panic across the area, forcing hundreds of families and individuals residing in the building to vacate the premises.
During a visit to the affected building on Sunday evening, dozens of residents were seen moving their belongings in different directions as officials of the Lagos State Emergency Management Agency cordoned off the premises.
The affected compound housing several defective buildings has been marked for demolition by Lagos officials.