The woman told deputies that the man attacked her in a hallway outside the parking garage in the 18000 block of Sundowner Way at about 8 a.m. Thursday. The woman suspect stole her purse and ran away after she fought back.
Authorities say the suspect also exposed himself to a second victim in the area moments before the attack.
The suspect was described as a male Hispanic, 25 to 30 years of age, 5'10" and about 180 pounds. He was last seen wearing a red shirt, black jacket, black shorts and a red beanie.
Anyone with information is urged to call the L.A. County Crime Stoppers at (800) 222-TIPS.