Police said the 26-year-old woman was running in the 1300 block of Diamond Street around 8:15 a.m. when a man grabbed her and forced her to the ground.As the man was groping the woman, two good Samaritans ran to help her and the suspect ran and jumped into a white sedan -- possibly an Acura or Honda Civic -- and drove away.Christopher Barrera, one of the good Samaritans who came to the woman's aid, told 10News, "I just saw a woman screaming, turned, asked her what happened, she said a man attacked her and I just saw the man sprinting really fast so I jumped on my scooter, tried to chase him through the residential areas but eventually lost him it's really jarring when something like this happens in your own community."The suspect is described as a dark-skinned Hispanic male in his 20s, standing about 6 feet tall. The man is said to be well-groomed with an athletic build. He was last seen wearing a blue tank top, khaki shorts and was barefoot."Our suspect likes to grope because of the joggers that are out," said SDPD Lt. J.P. Hara.San Diego police detectives are investigating to see if this case is similar to two other sex assault cases that happened in the same area in May.Anyone with information regarding this incident is asked to call the San Diego Police Sex Crimes Unit at 619- 531-2210.In the meantime, the neighborhood remains on high alert. Many residents are surprised by what happened."That shocks me. My little sister lives over on Law Street, I got family in the neighborhood; that's shocking," said resident Doug Fremdling.