At an apartment complex nearby, police said they found a white SUV that had part of a gas pump still hanging from the gas tank and also had bullet holes. The car had been reported missing from the town of Collierville, about 30 minutes away. At about 12:47 p.m., officers responded to Methodist North Hospital, where six gunshot victims had arrived in the emergency room, police said. A car hit by gunfire was found nearby, police said. Three of those victims remained in critical condition Tuesday afternoon, Memphis police said. Another was in non-critical condition, while two others were released, police said. The incident is among 400 mass shootings in the United States this year, according to the Gun Violence Archive, which defines such incidents as those in which at least four people are shot, not including a shooter. Investigators determined that 19-year-old Reginald Felix was with a 16-year-old and a 17-year-old in the stolen white SUV early Tuesday when they were shot near Raleigh LaGrange Road — where officers first heard gunshots that night. , according to the police report. A fourth victim was hit at that point and taken to the hospital in a private vehicle, authorities added. A 14-year-old and a 25-year-old drove Felix and the two teenagers from the apartment complex where the SUV was found to the hospital. During the drive, they were also shot by “unknown suspects,” police said. The five injured victims left their car and ran to the hospital, police added. Felix, who was among those released from the hospital, was charged with theft of property between $10,000 and $60,000, police said. Shelby County Jail records show Felix remained in custody Tuesday afternoon. Unknown if he has a lawyer. The 16-year-old, who was also released from the hospital, was taken to juvenile court and also charged with theft of property between $10,000 and $60,000. The 17-year-old, who remains hospitalized, is in custody and will face the same charge, police said. Authorities do not know if the suspects and victims are known to each other, police said, adding that the investigation is ongoing. No hospital employees were injured in the shooting, Methodist Healthcare in Memphis said in a statement. At the hospital, employees escorted patients away from the emergency department waiting area while the medical facility’s security team and Memphis police responded to the shooting, he said. The patients were treated and transported to Regional One Health and Le Bonheur hospitals. CNN’s Jamiel Lynch contributed to this report.