All the victims – eight adults and one young man – were in stable condition at two Newark hospitals, the city’s deputy director of public safety, Raul Malave, said in a statement. He said the police responded to the shot, in the square 200 of Clinton Place, a residential area in the Weequahic section of Newark at 6:19 pm. Authorities learned of the attack through the ShotSpotter system, a technology that detects shootings and alerts police. Newark police said five of those shot were able to reach the hospital on their own. They said a car stolen in Jersey City appeared to be at the center of the incident, but gave no details. Police said the youngest victim was 17 years old and the oldest 68. On Thursday night, a car of the police team was still hanging outside a convenience store, where the shooting had taken place five hours earlier. The metal security grilles of the store, 809 Supermarket, were lowered and locked. A gray hooded sweatshirt dipped in something that looked like blood was on the sidewalk in front. Mr. Malave did not disclose information about the motive of the attack or the number of perpetrators. Lauren Hard contributed to the report.