GREENWOOD, Ind. — Police are investigating a shooting at Greenwood Park Mall that happened around 6 p.m. Sunday.

Four people are dead and police tell 13News the shooter is among those dead.

Greenwood Chief James Ison said two others were wounded in the shooting and are being treated at area hospitals.

Ison said a “good Samaritan” witnessed the shooting and shot and killed the shooter.

“This has shaken us to our core. This isn’t something we’ve seen in Greenwood before. It is absolutely horrendous,” Ison said. He went on to say that they have trained for active shooter situations like this and he was proud of the response from law enforcement.

The shooter is only identified as an adult male at this time. Police said the shooter had a long rifle and several magazines of ammo.

People inside the mall at the time of the shooting told 13News reporter Logan Gay that they heard 20 gunshots in the food court. IMPD said it appears shots were only fired in the food court area.

IMPD is assisting at the scene and said there is no known ongoing threat, during a news conference at 7:45 p.m. Multiple police units went through the mall to make sure there were no people wounded or still sheltering in place.

IMPD said there is no information yet on a motive for the shooting.

Witnesses are being interviewed, according to IMPD.