A woman was pulled out of the rubble last night after rescuers heard her calling for help.
More than 20 people are admitted to the Kisii Teaching and Referral Hospital and another five to Christa Marianne.
First witnesses at the scene said they saw several people on top of the building before it came tumbling down.
Mr Julius Orare, who lives a few metres from the collapsed building, said he was taking a shower when he heard a tremor.
“I peeped through the bathroom window and saw the building in a heap,” he said.
A survivor, Mr Fidelis Onduso, who is nursing injuries, said he heard a huge bang.
“When I looked up, the house fell on me but luckily I was saved by well-wishers who rushed me to hospital,” he said.