An elderly woman was brutally attacked without provocation in Oakland - just days after the city's mayor touted a decrease in crime.

In a shocking video circulating on social media, the victim could be seen walking down the street behind another bystander while carrying a bag and piece of luggage by her side.

The unidentified woman looks up at a man wearing a 'Wild Boyz' black zip-up hoodie, white shirt, and black pants before being savagely punched in the head and falling to the ground.

After slugging the elderly woman, the maniac then takes a swing at the bystander walking in front of her, who was also carrying the suitcase.

As the suspect stole one of the elderly woman's bags and the bystander's suitcase, four men who watched the altercation unfold chased after the perpetrator.