The crash occurred at about 11:40 a.m. Monday near Kaiser Permanente Riverside Medical Center. Authorities confirmed the victim was an employee of the hospital.
Officers were in a nearby parking lot when they approached a parked car because of a vehicle code violation, police said. Police said the driver took off as officers walked up to the car.
Police said that just seconds later, as officers were getting into their patrol vehicle to begin a chase, the suspect struck a pedestrian believed to have been on a sidewalk not far from the medical center.
The victim was later pronounced dead.
No description of the suspect has been released. Police said the driver remains at large and the search is ongoing.