A fire broke out on the 20th storey of the Fook Hai Building in South Bridge Road last night.
Three people in the top-floor residential unit were sent to Singapore General Hospital because of smoke inhalation.
The Singapore Civil Defence Force (SCDF) said it received a call about the fire at 7.14pm.
It sent two fire engines, two Red Rhinos, two fire bikes and three support vehicles, which arrived within eight minutes.
The fire was in the living room of the unit which belonged to one of the three people, the SCDF said.
The flames were brought under control in 45 minutes and the cause of the fire is still under investigation, added the SCDF.
-- ST