3 killed in Colorado Walmart shooting; police seek suspect

Police in suburban Denver said Wednesday night that a third person has died following a shooting at a Walmart Super Center store.

Thornton is just north of Denver.

Police said the killings appear to be a random act of violence and not an act of terrorism.

Thornton police said this is not an active shooter situation as of 9:35 p.m. EDT. "We don't know exactly what the motive of the person was, but it was certainly a awful act".

Authorities did not immediately release any other information about the victims.

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"The employees started screaming and the customers started screaming" as people began to flee the store, he said. He said customers started screaming and running for the exits.

Thornton police reported "multiple parties down" and advised people to stay away from the area as dozens of police cruisers and emergency vehicles raced to the scene.

Guadalupe Perez told the AP that she heard the gunshots as she was in the store with her young son. "Let's go. Leave the groceries".

Investigators, including special agents with the Bureau of Alcohol, Tobacco, Firearms and Explosives, were reviewing security video and interviewing witnesses.

Avila told Reuters that Ostrem was a "local" but said he could not give more details while the investigation is under way.

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