Officers responded to a report of a shooting in the 5900 block of Foothill Boulevard at about 3:45 p.m., Officer R. Bowden said.
When officers arrived, they found a man suffering from gunshot wounds to the head and leg, Bowden said.
The man, believed to be 19 years old, was transported to a hospital to be treated for his injuries which are considered life-threatening, Bowden said.
He is not expected to survive, she said.
The suspect fled the scene of the shooting in a rental car and remains at large, Bowden said.
The shooting is under investigation.