Kenyan rescuers continued searching for survivors on Sunday of a residential building in a low income area that collapsed Friday, as officials said the death toll has risen to 20 and 73 people remain missing.
Japheth Koome, the police chief for Nairobi, the capital, confirmed the death toll.
Authorities had initially said the building had six stories but it emerged that the ground and first floor had sunk following heavy rains.
The building, next to a river, had been declared unfit for human habitation by Kenya's National Construction Authority but was not torn down.
Bribe-taking officers in the county government are responsible for allowing contractors bypass building codes, Nairobi governor Evan Kidero said. He vowed to fire those responsible. The building's owner obeyed police orders and turned himself in for questioning, Koome, Nairobi's police chief said.