A witness said the victims were in an SUV at the "Fast and Friendly" gas station on Saturday when a man ran up and shot three people.
Law enforcement searched the area for several hours, but officers didn't find the shooter or a second man who they believe was with him.
Sheriff's officials said two of the shooting victims have been treated and released from the hospital. The mother of one of the victims says the injuries are not life-threatening, but one of the three victims was shot three times.
Authorities are asking for anyone with information about the incident to call the Kings County Sheriff's Office.