Police are investigating a fire at Morphett Vale over night.

About 7.45pm on Sunday 12 February police and fire crews were called to Panalatinga Road, Morphett Vale after reports that a car wash was on fire.

MFS and CFS crews extinguished the blaze, but the car wash, located at the rear of the service station, was destroyed.  There were no injuries.

Southern District CIB detectives and fire cause investigators are attending the scene overnight to assist with the investigation.

Anyone with information is asked to contact Crime Stoppers on 1800 333 000 or report online at www.crimestopperssa.com.au – you can remain anonymous.