A probe is underway into a second blaze at a flat in Sheffield in three days.
In the early hours of this morning a fire broke out at a flat in Whinacre Close, Batemoor, while a woman and a child were in the property.
They escaped and were treated for smoke inhalation.
Firefighters were alerted to the blaze at 3.50am.
On Sunday night the door of the same flat was set alight.
Anyone with information should call South Yorkshire Police on 101