Eight fire trucks have raced to SKM Recycling stockpile facilities in Coolaroo, according to The Age.
There were reports of plumes of smoke coming from the site.
UPDATE 6:32am: Melbourne Fire Brigade has attended the scene and declared it as a “false alarm”.
“MFB Firefighters responded to a fire indicator panel alarm at Maffra St and Lennox St in Coolaroo at 5.33am.
“Firefighters arrived on scene and investigated the site, and determined it was a false alarm,” an MFB spokesperson said.