They also confirmed that no suspect was yet in custody. The men died inside the store and the woman died later that night at a hospital, authorities said on Twitter. "Active crime scene. We will update as info becomes available".
Police said the killings appear to be a random act of violence and not an act of terrorism. "We don't know exactly what the motive of the person was, but it was certainly a awful act".
Witness Guadalupe Perez was shopping when the shots were fired.
It is located off Interstate 25 in Thornton, north of downtown Denver.
Avila told Reuters that Ostrem was a "local" but said he could not give more details while the investigation is under way. The Walmart girl said, 'The balloons are popping.' And I turn around and I just see all the people walking, falling down because they were really scared.
'Shooting just occurred at Walmart, 9900 Grant St, multiple parties down. "Then I heard two more shots, and then I hit the ground because I didn't know if there were going to be bullets flying".
NBC television affiliate 9NEWS reported a woman whose son was in the Wal-Mart said he heard about 30 gunshots. "I was thinking, 'Oh my God, it's Las Vegas happening at Walmart in Thornton.' And I freaked".
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Michigan State-Penn State game delayed by lightning
The Nittany Lions still harbor playoff hopes, and this is probably their toughest remaining game in the regular season. Lewerke faked two hand-offs before setting his feet and firing to the front corner of the end zone at Spartan Stadium.
What Are Online Games
If we are all honest with each other, there is no denying that when real money is involved the activity is no longer for leisure. And in some cases, it is even used to refer to something that is done elsewhere for an income but now being done for recreation.