Vehicles were set on fire and isolated incidents of stone-pelting were reported as tension spread in Karnataka's Shivamogga town over the murder of a member of right-wing outfit Bajrang Dal. Harsha, a 26-year-old Bajrang Dal member who worked as a tailor, was stabbed by unidentified persons around 9 pm last night. He was rushed to hospital but could not survive. Police have arrested three people in connection with the murder case.