Officials report the death of Alameda County Supervisor Wilma Chan after she was hit by a motorist while walking her pet dog in Alameda on Wednesday afternoon.

The accident happened at about 8 in the morning when the 72-year-old Chan was crossing the street at Alameda’s waterfront, particularly at Shoreline Drive and Grand Street. Bicyclists and pedestrians alike are fond of the area, San Francisco Chronicle reported.

The county supervisor was found unconscious by emergency responders as she was in the roadway. She died at 2:30 in the afternoon in Highland Hospital where she was brought.

Police said in a statement that the driver of the car that struck Chan remained at the location and cooperated with the investigation. Law enforcers did not name Chan but her office confirmed she was the victim of the said incident.

“At this time, the cause of the collision has yet to be determined,” according to the police. “In the coming weeks, city personnel from APD, Public Works, and the Transportation Planning Department will conduct a review of the collision site and details from the investigation to discuss any potential safety interventions.”

Alameda County Supervisor Wilma Chan speaks during a student sign-up event at Merritt College hosted by Alameda County Supervisor Wilma Chan to celebrate the launch of the Affordable Care Act in the Student Center at Merritt College on Tuesday, October 1, 2013 in San Francisco, Calif. On October 1, 2013 the Covered California health insurance exchange opened up for Californians to sign up for health insurance around the state.

Chan started her career in public service in 1994 when she was elected to the Alameda County Board of Supervisors. A Democrat for a long time, she spent six years, from 2000 to 2006, serving on the state Assembly, where she became the first Asian American Assembly majority leader.

Chan succeeded when she ran for her former position on the Board of Supervisors in 2010.

“During her 30-year career in public service, Supervisor Chan had been a staunch advocate for children, families, the elderly, affordable housing, and health care for the uninsured,” Dave Brown, the supervisor’s chief of staff, said in a statement Wednesday.

Brown said Chan’s family “thanks the first responders and medical staff that provided wonderful care to Supervisor Chan, and they request privacy at this time.” She left two children and two grandchildren, while her dog, Maggie, was safe.