Authorities have arrested a 19-year-old driver and charged him with striking a man and a 6-year-old boy from behind as they were walking on a Cobb County residential road Friday night.

The driver, identified as Horacio Lopez-Vail, fled the scene without trying to help the 30-year-old man and the boy, according to Channel 2 Action News. Both victims were taken to hospitals with life-threatening injuries, police said. Their conditions had not been updated Sunday.

The Marietta Police Department’s specialized traffic unit is investigating the crash, which happened shortly after 9 p.m. along Chert Road between Roswell and Gresham roads.

According to investigators, witnesses described the vehicle the suspect was driving as a black or dark blue Toyota Corolla between 2009 and 2013 in model years.

Officers found the car around 6 p.m. Saturday, Channel 2 reported. They then arrested Lopez-Vail, who faces several charges, including two counts each of serious injury by vehicle and felony hit-and-run. He is also charged with tampering with evidence and not having a license.

Police did not release either of the victims’ names. Anyone with information is asked to contact investigators with the police department’s Selective Traffic Enforcement Program Unit at 770-794-5364.