( CNN ) -- A man plowed a car through the front doors of a Walmart store in California Sunday , then attacked customers with a blunt object , police said . The suspect drove more than 10 feet into a store in San Jose , California , got out of the car and began assaulting people , San Jose Police Officer Albert Morales said . `` He almost ran me over . ... He was in there to hurt people , '' one shaken witness told CNN affiliate KTVU . Four people were injured , one seriously , Morales said . The CNN affiliate showed video of the deep red Oldsmobile that had smashed into a beer display , leaving boxes and cans of Budweiser scattered on the Walmart store 's floor . The suspect was arrested on assault charges and remained in police custody Sunday afternoon , Morales said . His motive was unclear , Morales said , but police believe drugs or alcohol may have been involved .
NEW : Witness : `` He almost ran me over . ... He was in there to hurt people '' Police say a man is in custody after plowing into a Walmart store . He is also accused of assaulting several customers . Four people are injured , one seriously , police say .