Police are investigating a suspected arson attack at Sheidow Park in Adelaide's south which destroyed a two-storey house. 

Emergency services were called to Historic Close just after 1:00am on Saturday following reports of a house on fire. 

Police said the house, which was unoccupied, was completely destroyed, with the damage bill set at about $1 million. 

Police released CCTV footage from a security camera this afternoon, showing two suspects running from the home and getting into a waiting car before driving away. 

Metropolitan fire crews put out a small fire at the same home in the early hours of Friday morning, which did not cause any damage. 

Police have urged anyone with information about the suspicious fires to contact Crime Stoppers.