At least two people were injured in a shooting incident at a shopping mall in Northern California's city of San Bruno on Tuesday afternoon (local time).
The incident has prompted a heavy police response in the area. Dozens of people have been evacuated from the mall and a nearby train station has been closed, reported CNN.
The injured have been rushed to a local hospital. It is unclear whether the shooting was intentional.
"We believe that we may have 2 separate shooters," Barberini said, adding the shooters may have been firing at each other or at someone else.
Further details into the matter are awaited.