A man, a woman and a child in a white sedan all sustained moderate gunshot wounds Sunday night in a freeway shooting, and the California Highway Patrol is asking for help from the public in identifying suspects.

CHP Officer John Franzen said the white sedan was on the transition ramp from eastbound Interstate Highway 580 to state Highway 24 in Oakland about 6 p.m. Sunday when the vehicle was hit by gunfire. Injured were a 28-year-old man, a 23-year-old woman and a 2-year-old child; all were taken to a local hospital for treatment.

Franzen said he wasn't sure who reported the shootings in a call to 911.

No one else in any other vehicles was injured. Franzen said that, as of late Sunday night, the CHP had no information on possible suspects. Detectives assigned to CHP's Golden Gate Division Investigative Services Unit are actively investigating Sunday night, and need help from the public in gathering information. Anyone with information that might be helpful is asked to call the CHP Investigative Tipline at (707) 917-4491.