The man entered Royal Tan and Spa at 2729 Yulupa Ave. at about 3 p.m. Wednesday. Brandishing a handgun, he demanded money and fled on foot through the parking lot with an undisclosed amount of cash, police said.
Officers responding to reports of an armed robbery at the tanning salon arrived within 30 seconds of the 911 call, but were unable to locate the suspect, police said.
The suspect is described as a white man approximately 25 years old, 5 feet 7 inches tall and weighing 120 pounds.
Using images captured from video surveillance at the time of the robbery, the suspect appeared to be wearing a "Lite" beer T-shirt and has tattoos on both of his calves.
Anyone with information regarding this investigation is urged to contact Detective Tom Peirsol with the Santa Rosa police violent crimes team at (707) 543-3590.