Residents were evacuated from some flats in Barnsley this morning after a wheelie bin was set alight outside their homes.
Flames from the blaze damaged the door and windows to one of the flats, which was unoccupied at the time.
The flats above were evacuated as a precaution.
Firefighters were alerted to the incident on Springwood Road, Hoyland, at 4.30am today.
The fire was started deliberately.
Anyone with information should call South Yorkshire Police on 101.