Police said officers were sent to the store at about 5 p.m. and found two cans wrapped in duct tape with wires sticking out of them.
Walmart closes 4 Chicago locations permanently, leaving residents with fewer shopping options
The parking lot was cleared and the Porter County Bomb Squad was called to the scene. The bomb squad took the cans to further investigate.
Police said it was an isolated incident and after the scene was cleared, the store reopened for business.
Man threatens to blow up local news station in Michigan, leading to hours-long standoff