Selangor Fire and Rescue Department assistant director (operations) Mohd Sani Harul said they received a report about a minor fire at 1 Utama around 9pm.
"We were told that the fire started at the children's playground equipment storage area on the fifth floor at the new wing of the shopping mall," he said when contacted late Sunday.
He said the fire was put out before firemen arrived at the scene, adding that no one was injured during the incident.
"The cause of the fire and losses are being investigated," he said.
According to an employee of 1 Utama, the blackout occurred around 8pm and the fire occurred an hour later at the fertiliser storage unit in the mall's upper floor.