Mr. Lister and his team ran out the nearest fire exit.
As they were running, he said, they heard 50 to 60 gunshots — at which point they picked up their speed and helped each other over a barbed-wire fence.
When Mr. Lister looked back at the building, he saw that a white vehicle had rammed into an entrance, he said. The glass that had shattered from the crash caused his colleague’s arm to bleed, he said.
“To hear that much gunfire, it was frantic,” said Mr. Lister, who unloads deliveries that are then repackaged and shipped to Walmart stores. “People were running as fast as they could move.”
Emergency dispatchers told The Record Searchlight, a newspaper in Redding, Calif., that officials shot the gunman in the chest around 3:45 p.m. local time, about 15 minutes after the shooting began.
A Walmart employee, Scott Thammakhanty, told The Record Searchlight that he had heard gunshots and had seen people on the ground as he and other employees ran.