Manhunt underway after shooting in Walmart

Thornton, Colorado police are searching for the suspect in what they called a "random" shooting at a Walmart that left three people dead.
1:44 | 11/02/17

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Transcript for Manhunt underway after shooting in Walmart
We're going to turn to that breaking news. A manhunt under way in Colorado for this gunman seen on surveillance video entering a Walmart opening fire. ABC's Clayton Sandell is there on the scene for us in Thornton, good morning, Clayton. Reporter: And good morning, robin. You can see the parking lot is still filled with cars that were abandoned by shoppers who were in that store when the gunfire have been erupted marked with this red evidence tape. I got off the phone with police. They say they still don't know the identity. An urgent manhunt now under way in Colorado. The person came in and just shot towards the group. Reporter: After a shooting leaves three people dead. Police say this man entered the store located in the town of Thornton north of Denver just after 6:00 P.M. The witness accounts that he just nonchalantly walked into the front of the business. Reporter: Using a handgun opens fire. Those are gun the shos. We need to get out of here. There were about five to six gunshots and knew we had to get out as soon as possible. Reporter: Two men and a woman were killed near the front cash hedge registers. The suspect captured here calmly walked out in a red American beneficial shui while others texted worried friends and family. If anything happens to me, I love you guys. I love you all so much. Reporter: Police say the shooting appears random but for now the motive is unclear. For now federal agents including the ATF and FBI are here helping in this manhunt and for now they are not calling this an act of terrorism but say it is early and it certainly was terrifying for anyone inside this store. Absolutely. Clayton, we hope they find him

This transcript has been automatically generated and may not be 100% accurate.

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