Seven minors were hospitalized with injuries late Saturday night after a mass shooting broke out in downtown Indianapolis, police said, writes CBS NEWS.

The children and teenagers, who were between the ages of 12 and 17 years old, each sustained gunshot wounds in the shooting, which happened just after 11 p.m. local time outside of the city’s Circle Centre Mall. CBS affiliate WTTV shared images from the scene.

No suspects have been arrested, but investigators believe more than one weapon was used to carry out the shooting, according to the Indianapolis Metro Police Department. A police report filed after the incident identified four boys and three girls as victims, all of whom were stable when Indianapolis Deputy Police Chief Tanya Terry gave preliminary details about the incident at a briefing early Sunday morning.

Police said they initially responded after patrol officers in the downtown area heard several shots being fired nearby. They found six minors, among a larger group of kids, suffering from injuries consistent with gunshot wounds. An emergency medical services crew transported all of them to a hospital for treatment. One of the victims" conditions was critical at the time of transport, but the classification was updated and that person is now stable. The other five victims were stable when they were transported.

A seventh victim, who police determined had been shot during the same downtown incident, was treated as a walk-in at a different hospital. That person’s condition was listed as stable too, according to Indianapolis police.