Mesa police said Friday that the 41-year-old victim was being treated for second-degree burns to her face and chest area after the attack Thursday.
Police say the act does not appear to be random. They are following up on leads to find the female suspect, between 30 and 40 years old.
A similar attack that was random occurred Monday in Vancouver, Wash., where a woman threw a cup of acid on the face of 28-year-old Bethany Storro as she was getting something from her car before heading into a Starbucks. The suspect, who Storro said told her "Hey pretty girl, do you want to drink this?" before she attacked her, still has not been found.