Walmart in Sault Ste. Marie closed shortly after 9 a.m. on Friday so technicians could repair the sprinkler system.
"Fire Services attended Walmart this morning for a break in the fire sprinkler system," said Aaron Gravelle, public education officer with Sault Fire Services.
"No fire or injuries reported on our end. Fire system technicians are on scene working on the repair."
The store reopened at noon.
** This story was updated at 3 p.m. to include when the store reopened **