Police arrested two people and are searching for a third person in connection with a violent attack in a Tierrasanta neighborhood park.According to San Diego police, a 22-year-old woman was attacked around 11:30 a.m. Monday. Police said the woman was there with a male friend when three people jumped out of a truck and attacked them. Police said they first tried grabbing a camera from the man, and when he refused to let go the trio grabbed the woman's purse.Police said at the same time, one of the men, 43-year-old Ramone Mafnis, was hitting the woman with a sock filled with rocks. Witnesses said they could hear her cries for help."I heard someone saying, 'Stop! Help! Somebody help, please!'" said witness Brandon De La Torre.That's when De La Torre ran out of his Tierrasanta home and saw Mafnis beating the 22-year-old woman."He had a sock with a wrench or something in it and he started smacking her legs with it," said De La Torre.Police said there were rocks at the end of the sock. They said Mafnis, 22-year-old Katie Cortez and an adult white male are responsible for the attack.De La Torre said the trio took off with the woman's purse when witnesses started running toward them.Police said the female victim recognized her attacker."The victim also advised us that 'Ray' lived in the area of Mount Everest," said SDPD Lt. Darryl Hoover.Police said after the attack, a police helicopter spotted the suspect's white Ford Explorer running stop signs as it headed toward the Clairemont area. Police caught up to them and arrested them without incident.Witnesses from the park were driven to the scene in squad cars so they can identify Mafnis and Cortez. Police said each of the witnesses positively identified the two from the attack in the park."That's the worst part there's little kids and toddlers that are getting mixed into all this nonsense," said De La Torre.Mafnis and Cortez are being held on robbery and assault charges.Police said they are confident they'll find the third person linked to the attack.