The Walmart on Northern Avenue in Pueblo has been evacuated Wednesday evening.
Police say a car was found in the emergency parking zone in front of the store.
Inside the car, officers found suspicious items, including electrical equipment and wiring.
The driver of the car was nowhere to be found.
Police evacuated the Walmart and the bomb squad was called.
A bomb squad robot has been called in to help crews investigate the car and suspicious equipment.
The driver of the car has not been located.
The owner of the car says she let a person borrow it, but had no idea they were putting any suspicious items in the vehicle.
The car's owner is cooperating with police.