2 people and suspect killed in Walmart parking lot shooting

The alleged shooter opened fire on two people in a car in Duncan, Oklahoma, before turning the gun on himself when he was approached by an armed citizen, authorities said.
1:55 | 11/19/19

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Transcript for 2 people and suspect killed in Walmart parking lot shooting
And we are following two doping stories. Two deadly shootings. The urgent hunt under way this hour another another deadly shooting at a Walmart. A bystander with a gun approaching the suspect in the parking lot. The gunman would then turn the weapon on himself. At least nine shots fired. Family members rushing to the scene. ABC's Marcus Moore is also on the scene tonight from Duncan, Oklahoma. Reporter: The calls came in just before 10:00 this morning. Getting several reports of shots fired at Walmart parking lot. Reporter: Police racing to this Walmart, 80 miles south of Oklahoma City. This is a very sad tale that's unfolding here in Duncan, Oklahoma. Reporter: Schools placed on lockdown. We know that two people were inside of this red car you're seeing right here with the bullet holes in the windshield. Reporter: Three people, including the alleged shooter, dead. A handgun found at the scene. We have two white males. And a white female. Two of the victims are inside the vehicle, one is outside the vehicle. Reporter: A witness telling station KOCO that before the gunman took his own life, an armed citizen approached the man. He told him to stop and then after that, the shooter did stop and then he turned the gun on himself. Reporter: Police say this was an isolated incident outside the store, but the shooting comes just days after the Walmart in El Paso reopened, where a gunman killed 22 people in August. With the history in the last several years, it has a lot of impact. It makes people very fearful. It makes people wonder what's going on. So, let's get right though Marcus Moore tonight, live from Duncan, Oklahoma. And any word of a motive tonight, Marcus? Reporter: Well, David, police are not commenting on a motive, T they do say that the victims and the alleged shooter all knew each other. And tonight, invesgators are looking at surveillance images, trying to get a better picture of what happened in this parking David? Marcus Moore, thank you. Also developing just before

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

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