Santa Rosa police have arrested one of four people suspected of stabbing a 17-year-old boy in what appears to have been a gang-related crime Wednesday night. The teen was stabbed more than 15 times at about 8 p.m. in the 900 block of Washington Street, but his injuries are not life threatening, police said. Sgt. Steve Fraga said multiple suspects chased the teen for a few blocks and fled before officers arrived. The stabbing is being investigated as a gang-related crime, Fraga said. Police identified four suspects, three adults and one juvenile, on Thursday and served search warrants at four residences, Fraga said. Officers arrested Lorenzo Medina, 28, for attempted murder and two gang-related enhancements, Fraga said. He was booked into the Sonoma County jail and is scheduled to be arraigned Monday afternoon in Sonoma County Superior Court. Police are still looking for a 17-year-old boy and two men — Jesus Camacho Nunez and Miguel Angel Galvan-Morfin, both 21 — in connection with the attempted murder, Fraga said. The Sonoma County Alliance has offered a $2,500 reward through its “Take Back Our Streets Program” for information that leads to the arrest of the outstanding suspects.