The latest incident took place at a Sam's Jewelers store at the Southland Mall in Hayward around 5:30pm PST Sunday evening and was caught on camera.
Robbers - said to have been part of a gang of roughly 40 to 50 teens who entered the mall - used hammers to break display cases at Sam's, before making off with goods. Dramatic footage caught from a nearby store revealed shop workers yelling with fear as the disturbing scene unfolded.
Furthermore, on Sunday, a different gang of looters snatched garments from upmarket yoga clothing brand Lululemon's San Jose store, KPIX reported.
And on Saturday, video posted to Twitter, a swarm of robbers was caught on security camera stealing prescriptions from Wellspring Pharmacy in Oakland at around 7.30pm.
Pharmacy employees sped up the footage to show dozens of people running through the store to take boxes of drugs off the shelves before swiftly moving out. It is unclear what drugs were taken, though staff say customers' whose meds were stolen will be able to collect replacement meds that have been ordered in.
Store employees told KGO-TV reporter Dion Lim they were "overwhelmed and devastated" by the brazen theft, as it is a tiny drug market and does not have the same resources as chains like CVS or Walgreens.
Video of Sam's incident, in the meantime, shows the men, all of whom were wearing hoodies, smashing the cases, and running off with handfuls of jewelry, with one man even running back to grab an item he dropped before fleeing.
People inside the store yelled and ran away from the horrifying scene, which has grown common in the Bay Area since a California state law downgraded the theft of property less than $950 in value from a felony charge to a misdemeanor in 2014.
Store staff and security now tend not to pursue or hinder robbers who have taken anything worth less than $1,000.
Sources state the Macy's at the Southland Mall was further attacked on Sunday, with two women who work near Sam's Jewelers telling KPIX that the teens likewise ran into another store and left with clothes and shoes.
"We saw all the other stores closing," remarked one of the women, whom KPIX did not name. "They were panicking, so we were panicking and quickly closed our store and barricaded ourselves."
"It was very scary," stated the other woman, who likewise was not named. She described the brazen thieves as "people with no morals, no sense for other people's safety."