Waterloo Regional Police are investigating a suspicious fire inside a Walmart at Bridgeport Plaza in Waterloo.
Emergency services were called to Bridgeport Road East and Weber Street North around 10 p.m. Sunday.
Police said the fire was inside the store but gave no details about what part of the store was involved or how the fire started. The extent of the damage is also not known.
The flames was extinguished by members of the Waterloo Fire Department.
No one was hurt.
On Monday afternoon, a sign on the door said the store was closed temporarily.
Anyone with information is asked contact police.