UPDATE: The cause of smoke from a Pinjarra Road business could not be determined.
Fire crews have now departed the scene after an extensive search of the roof cavity and other areas failed to locate where an electrical smell and smoke was coming from.
The smoke and smell were no longer present when crews left the site.
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Fire crews were called to a Pinjarra Road property with reports of smoke coming from a shed.
Firefighters from Mandurah attended the scene with back up stood down before 11am.
Smoke and an electrical smell was reported to be coming from a rear workshop shed but after turning off power, crews were unable to locate the source.
Fire crews are still at the scene.