3 Killed in a Thornton, Colo., Walmart

Police in Colorado on Thursday were searching for a gunman who calmly walked into a Walmart in suburban Denver and opened fire with a handgun, randomly shooting at shoppers and store clerks, killing three people, before he fled.

The suspect “nonchalantly” entered a Walmart in Thornton, Colorado, and opened fire a little after 6 p.m. local time on Wednesday and then walked out, got into a red four-door hatchback and drove away, Thornton Police Department spokesman Victor Aliva told reporters, citing witness accounts.

“What we have determined is that it is random as of right now,” Aliva said. “As witnesses stated, the person came in and just shot toward a group.”

Two men died at the scene of the shooting. A wounded woman was taken to a hospital where she died, he said.

The shooter is a white man, who was wearing a black jacket, maroon shirt and blue jeans, Aliva said.

There was no indication that the shooting was an act of terrorism as no one has claimed responsibility, he said.

“We can’t rule anything out,” he said.

Thornton is city of about 120,000 people roughly 10 miles (16 km) northeast of downtown Denver. (Reuters)

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3 Killed in a Thornton, Colo., Walmart

Police investigate the scene of a shooting at a Wal Mart store in the Thorton Town Center shopping plaza on Nov. 1, 2017 in Thornton, Colo. (Photo: Marc Piscotty/Getty Images)

3 Killed in a Thornton, Colo., Walmart

This Wednesday, Nov. 1, 2017, image released by the Thornton Police Department shows shooting suspect Scott Ostrem at a Walmart in Thornton, Colo. Colorado authorities identified Ostrema as the man who police say nonchalantly walked into the Walmart and immediately opened fire with a handgun, killing several. (Photo: Thornton Police Department via AP)

3 Killed in a Thornton, Colo., Walmart

Patrick Carnes is evacuated in a Walmart cart by SWAT medics from the scene of a shooting at a Walmart where Carnes was shopping in Thornton, Colo., Nov. 1, 2017. (Photo: Rick Wilking/Reuters)

3 Killed in a Thornton, Colo., Walmart

People watch an ambulance leave at the scene of a shooting at a Walmart in Thornton, Colo., Nov. 1, 2017. (Photo: Rick Wilking/Reuters)

3 Killed in a Thornton, Colo., Walmart

Walmart employees and customers head away from the scene outside of the Walmart store where a shooting occurred inside the store at 9901 Grant Street on Nov. 1, 2017 in Thornton, Colo. (Photo: Helen H. Richardson/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

Police enter the store after a shooting in Walmart. Thornton, CO. November 1, 2017 in Thornton, Colo. (Photo: Joe Amon/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

Employees exit the parking lot after a gunman opened fire near the Halloween section of Walmart at 99th and Grant Street in Thornton, Colo. (Photo: Aaron Ontiveroz/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

Police at shooting in Walmart in Thornton, Colo., on Nov. 1, 2017. (Photo: Joe Amon/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

Customers being interviewed by Police after a shooting in Walmart in Thornton, Colo., on Nov. 1, 2017. (Photo: Joe Amon/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

A father and his scared daughter, who were customers inside Walmart, are escorted out of the parking lot and away from the scene of the Walmart store where a shooting occurred inside the store at 9901 Grant Street on Nov. 1, 2017 in Thornton, Colo. (Photo: Helen H. Richardson/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

Police enter the store after a shooting in Walmart in Thornton, Colo., on Nov. 1, 2017. (Photo: Joe Amon/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

A witness is loaded into an ambulance, after she and others were taken to Thornton Civic Center, preceding a shooting inside the Walmart Super Center, Nov. 1, 2017 in Thornton, Colo. (Photo: RJ Sangosti/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

Police interview Walmart employees and shoppers at the scene of a shooting at a Walmart in Thornton, Colo., Nov. 1, 2017. (Photo: Rick Wilking/Reuters)

3 Killed in Walmart in Thornton, Colorado

A police officer stands guard near the intersection of Grant St. and 98th Ave during a shooting investigation at a Walmart super center, Nov. 1, 2017 in Thornton, Colo. (Photo: Andy Cross/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

Walmart employees and customers head away from the scene outside of the Walmart store where a shooting occurred inside the store at 9901 Grant Street on November 1, 2017 in Thornton, Colo. (Photo: Helen H. Richardson/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

Police guard the entrance at the scene of a shooting at a Walmart in Thornton, Colo., Nov. 1, 2017. (Photo: Rick Wilking/Reuters)

3 Killed in a Thornton, Colo., Walmart

Witnesses comfort each other outside the Thornton Police Station after two men are dead during a shooting inside the Walmart Super Center on Nov. 1, 2017 in Thornton, Colo. (Photo: RJ Sangosti/The Denver Post via Getty Images)

3 Killed in a Thornton, Colo., Walmart

A woman walks past an ambulance near the scene of a shooting at a Walmart in Thornton, Colo., Nov. 1, 2017. (Photo: Rick Wilking/Reuters)

3 Killed in a Thornton, Colo., Walmart

A lone shopping cart sits in the parking lot as police investigate the scene of a shooting at a Wal Mart store in the Thorton Town Center shopping plaza on Nov. 1, 2017 in Thornton, Colo. (Photo: Marc Piscotty/Getty Images)