Police responded around 10:35 p.m. to reports of a shooting in the area of 1214 Sycamore Drive, according to Antioch police Lt. Diane Aguinaga.
Officers arriving on the scene located a man who had been killed from a single gunshot wound.
The shooting victim was identified as 30-year-old Antioch man Maurice Wagner, police said.
Investigators are following some leads but do not have a suspect description or a motive for the shooting.
Anyone with information about the shooting is urged to contact Antioch police Detective Robert Green at (925) 779-6932 or at (925) 779-6927 or to text a tip to 274637 using the key word Antioch.