A five-storey building under construction collapsed in Ruaka, Kiambu County, on Monday night.
According to a statement by Kenya Red Cross on Twitter, one person who was trapped in the rubble was saved and rushed to Kenyatta National Hospital, Nairobi, for treatment.
The incident occurred near Ndenderu, off Limuru Road, some minutes to midnight.
Reports indicate that there was blackout after the incident.
In November last year, the government ordered an inspection of buildings in Kiambu County after concern over their structural soundness.