LYNN – An 89-year-old Lynn woman was savagely attacked and robbed by a 15-year-old boy Tuesday morning as she was walking in a CVS parking lot on Eastern Avenue.Helen Surawski said she was shoved to the ground and hit her head and knee as her purse was snatched from her arms by the unidentified Lynn teen. Two witnesses – James Donovan of Swampscott and John Levie of Marblehead – saw the struggle and chased down the suspect, whom they held until police arrived.The teen has been charged with unarmed robbery of a person over 65, assault and battery on a person over 60 and assault and battery with a dangerous weapon, purse, which stems from hitting a witness. He is expected to be arraigned today at Lynn District Juvenile Court.”The younger people are into bad things these days,” Surawski said. “I’m just lucky that I didn’t get badly hurt.”The robbery happened at approximately 10:45 a.m. in the CVS parking lot located at 509 Eastern Ave.Lt. William Sharpe said Surawski told police she had noticed that the suspect was following her as she walked on Eastern Avenue. She said she went into a bakery on the street and he followed her inside.Then she said she walked into CVS, where he followed her inside as well.”I didn’t think anything of it at the time when I saw him looking at items in the store, but he was probably following me around,” she said. “Then, when I was walking in between cars in the parking lot, I felt a tug on my pocketbook and he knocked me down and yanked the bag off of me. It really shook me up because it was very unexpected.”An ambulance treated Surawski at the scene for a bruised knee and minor head injury and was driven home by police. Surawski, who turns 90 in October, said she has been walking around the city for years and plans to continue doing so, despite her attack, by walking to a scheduled hair appointment on Thursday.”You don’t think of these things happening in broad daylight,” she said. “My son told me not to carry a pocketbook, but how can a woman be without her pocketbook?”Tuesday’s robbery marks the third violent incident on an elderly Lynn resident since November 2010.On Nov. 15, Eastern Avenue resident Geneva Sozanski, 89, was badly beaten and robbed in front of her home, and on Jan. 25, 94-year-old South Common Street resident Lillian Sutson was hit on the head and robbed in her home.”I know Geneva, my husband was a patient of her husbands for years,” Surawski said. “She was badly injured and was lucky that someone found and helped her.”Calls and text messages placed to Mayor Judith Flanagan Kennedy and her chief of staff, Claire Cavanagh, for comment on the attack were not returned Tuesday.