Investigations are continuing into a house fire at Whyalla Stuart yesterday morning.
Police and emergency crews responded to reports of a duplex fire in Bevan Crescent, just before 5:30am.
The fire spread to the adjoining unit, causing significant damage, before being extinguished by fire crews.
Both units were unoccupied and there were no reported injuries.
Police are urging anyone who saw suspicious activity in the area to contact Crime Stoppers.