The release said the attack had not been provoked.
The officer fired his gun, killing 32-year-old Kenneth French and injuring two French family members. The injured relatives were taken to the local hospitals where they are in critical condition.
The officer suffered minor injuries and was discharged from hospital. His child had not been injured in the incident, it says in the press release.
"The department has opened an administrative investigation and is working with the Corona Police Department to learn more about the incident," police said in a statement in Los Angeles. 1
Many left their personal belongings – purses, cell phones and backpacks – in the store to get out quickly. The Corona police are now trying to find their rightful owners.