Three cars torched in Adelaide

A number of cars have been torched in Adelaide's northern suburbs.

Police and fire crews were called to Elizabeth South after a car was set alight near the train station at 2.10am on Sunday.

About an hour later a Mazda sedan was set on fire outside an Elizabeth Vale house and a few minutes later, another car was found burning in Munno Para.

Police are treating all three fires as suspicious and say the same person may be responsible.