Following the robbery, one of getaway vehicles, a Nissan NP200 bakkie, was spotted. Officers from the anti-gang unit confronted the robbers on a nearby highway and a shootout ensued.
One suspect was shot dead, Peters said. One was arrested and a third fled the scene. Police recovered one firearm, which would be sent for ballistic testing.
Peters said police were still searching for a second vehicle, a white VW Polo hatchback, which went in the direction of Pimville.
ER24 spokesman Russel Meiring said paramedics arrived at the scene around 4pm. He said a man believed to be in his 30s sustained a gunshot wound to his upper leg. He later confirmed that the injured man was a security guard.
The man was treated on the scene and transported to a nearby hospital.
Meiring said three staff members of a shop in the mall were also treated after they were allegedly assaulted by the gunmen.
In a statement on Tuesday night, Cresta Shopping Centre confirmed that the Dion Wired store was hit.
"Centre management can confirm that a security guard was injured in an attempt to stop the robbery, and he is safe and being attended to in hospital," the statement read.