A man nonchalantly walked into a Walmart and immediately opened fire with a handgun, killing two men and a woman before fleeing in a auto on Wednesday night, according to Colorado authorities.
Police spokesman Victor Avila said the suspect calmly walked into the Walmart store at 6:10 pm.
A bus full of people who were inside the store at the time of the shooting were taken on an RTD bus to the Thornton Police department, which is just to the south of the store.
According to the Thornton Police Department, 47-year-old Steve Ostrem nonchalantly walked into the Walmart in Thornton and opened fire on a group of people near the cash registers. Police had issued a warrant for his arrest the night before, and received an anonymous tip for his whereabouts.
Neighbors of the man suspected of fatally shooting three people at a suburban Denver Walmart say he was unfriendly and occasionally hostile toward them.
The motive was unknown, Avila said. Thornton Police said they are now reviewing security camera footage and interviewing witnesses "for assistance with suspect (s) description/info".More news: The Starbucks Holiday Cups Are Officially Here — ALERT
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SWAT officers who helped with the arrest did use a "flash bang" to distract Ostrem, Avila said.
While investigators have no idea why the man started shooting, they did say the shooting is not known to be an act of terrorism. Authorities used security video to help identify the suspect.
The names of the victims have not been released though Tiffany Wilson, Director of Walmart Communications, did confirm that all Walmart staff has been accounted for.
"The employees started screaming".
Customers and employees hid or fled toward the exits after gunshots rang out in Thornton, which is a suburb of Denver.