Lt. Scott Dunn said the suspects entered the store, located at 3301 Santa Rosa Ave., around 11:30 p.m. and forced employees and customers down to the floor at gunpoint.
The suspects fled with an undisclosed amount of cash from the register and from at least one customer, Dunn said.
Several witnesses left the store before sheriff's deputies arrived, Dunn said.
The suspects are males with thin to average builds. They were wearing dark clothing with material covering their faces, Dunn said.