Thornton Police department on Wednesday said that "multiple parties are down" after shooting occurred at a Walmart on Grant Street in Colorado.
"Shooting just occurred at Walmart, 9900 Grant St, multiple parties down. Please stay away from the area," Thornton Police department tweeted.
The store was evacuated as police arrived on scene.
According to the U.S. media, it's unclear who fired the shots. Thornton police said that the patrol officers are searching the store for the possible shooter.
Further details are awaited.