BERKELEY -- Police are investigating a homicide after a man was found shot outside his car on a winding roadway in the East Bay Hills on Sunday.

Officers were called at about 5:40 a.m. to Grizzly Peak Boulevard after receiving multiple 911 calls of a person needing medical attention, said University of California Police Department Lt. Alex Yao.

At the scene, officers discovered a car off the windy roadway just south of sign post 16, between Centennial Drive and South Park Drive, Yao said.

Outside the car on the ground, police found a man suffering from a gunshot wound.

Officer performed medical aid but the man died at the scene, Yao said. He was pronounced dead by Berkeley firefighters.

The roadway was closed to traffic for a few hours following the shooting.

The victim's name is not being released pending notification of his next of kin, Yao said.

Police are not releasing any additional information about the shooting including the man's age, city of residence and what kind of car he drove as the incident remained under investigation on Sunday.

It was not immediately known who shot the man or what the motive for the shooting was and police would not say whether they had a suspect in custody.

But police did say the shooting does not appear to be random.

"Based on a preliminary investigation we believe this appears to be an isolated incident," Yao said.

Anyone with information about the shooting is asked to call police at 510-981-5900.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.