The building is located at Number 9, Amosun Street, Ijora. Badia.
Officials of the Lagos State Emergency Management Agency, LASEMA, and other rescue agencies were on ground to salvage the situation.
General Manager, LASEMA, Adesina Tiamiyu, that the three-storey building was an abandoned one and that residents had already vacated the apartment.
He said three illegal occupants were in the building when it partially collapsed from at the back on Saturday.
Tiamiyu said two of the illegal occupants were brought out D€ad while one was rescued with injuries.