A 19-year-old man was killed Thursday morning in a Gresham neighborhood shooting on the South Side, authorities said.

William D. Moore was sitting in a vehicle at 11:02 a.m. in the 8500 block of South Justine when a black SUV drove up and someone inside fired shots, striking him multiple times, according to Chicago Police and the Cook County medical examiner’s office.

He was found in the vehicle by responding officers, and was pronounced dead at the scene at 11:16 a.m., authorities said.

An autopsy Friday determined Moore died of multiple gun shot wounds, the medical examiner’s office said.