Police and fire crews were called to an incident in a Sheffield flat earlier this morning.
The fire had been deliberately started at the back of the building.
Officers were called to the scene at Batemoor Place at 5.06am.
In a statement, South Yorkshire Police said: “At around 5.06am this morning officers were called to a fire at Batemoor Place, Sheffield. South Yorkshire Fire and Rescue also attended.
“All the residents of the building were safely evacuated without injury and one elderly resident was advised to seek treatment for smoke inhalation.