Police are looking for a gunman who beat a woman outside a north-side shopping center and stole her purse.

Security photos show the woman just before 8 p.m. Sunday walking toward the entrance to Walmart at 455 E. Wetmore Road between First and Stone avenues, when a man attacks her from behind, repeatedly hitting her in the head with a handgun. When a witness tried to intervene, the robber pointed the gun at him.

The robber took the woman’s purse and got into the passenger seat of a waiting silver Chevrolet Impala that had chrome wheels and a sunroof.

The woman who was attacked confronted the driver of the car and was dragged for several hundred feet through the parking lot. She was taken to a hospital with serious injuries.

The robber is described as in his 20s, standing 5-feet-6 and weighing about 160 pounds. He was wearing a white T-shirt with a logo on the front and baggy shorts with dark stripes on the sides. The getaway driver is described as a thin man wearing a dark shirt and dark pants.

Senior Editor, News, Arizona Daily Star, Tucson, Az.