The two stable victims were children aged 2 and 13, police said.
Officials say four people have died and two others are hospitalized in stable condition following Monday night’s mass shooting in the Kingsessing neighborhood of Philadelphia.
Philadelphia Police Commissioner Danielle M. Outlaw said two people are in custody: a 40-year-old man believed to be a suspect in the shooting, and a second person who authorities believe has picked up a gun and started shooting at the suspect. Police said the suspect was wearing a bulletproof vest, carrying several magazines and opened fire indiscriminately.
“The officers reacted quickly and showed courage and bravery,” Outlaw said at a press conference, adding, “Their actions prevented more victims from happening. .”
Police received a report of gunfire in the area behind Chester Street around 8:56 p.m. ET. Officers attended the scene and found the gunshot victims, who have yet to be identified, police said.
Of the four victims who died, three were between the ages of 20 and 59, while the fourth victim may have been between 16 and 21 years old, authorities said. All are men. According to police, the two stable victims, also men, were children aged 2 and 13.
Outlaw said multiple gunshots were heard in several areas near the first site of the shooting.
According to police, after arriving at the scene, officers identified the suspect and pursued him on foot. Authorities said the suspect was arrested in the back alley of 1600 Frazier Street, and is believed to have an AR-style rifle and pistol, as well as a police scanner. Another rifle was discovered in the alley and is believed to be the gun believed to belong to the second man, who police said fired at the suspect.
Authorities say they are still trying to determine a motive for the shooting and have not identified any link between the victims and the suspect.
Police began checking the area for witnesses and camera footage after the shooting.
ABC News’ Jason Volack contributed to this story.
This is an evolving story. Please check back for updates.