Police are investigating the cause of a shed fire at McLaren Flat this morning.

About 12.15am Saturday 6 July emergency services were called to McLaren Flat Road after reports a large shed was on fire.

When emergency services arrived at the scene the shed was fully involved, fire crews battled the blaze while patrols searched the area and spoke to witnesses.

The fire was brought under control in just under two hours however the shed and heavy machinery that had been inside was destroyed.

Fire Cause Investigators were recalled and attended the scene this morning to investigate the circumstances surrounding the fire. The caused of the fire is currently unknown and the investigation is ongoing.

Anyone with information that may assist is asked to contact Crime Stoppers at www.crimestopperssa.com.au or phone 1800 333 000 – you can remain anonymous.