A 25-year-old man, Kolipaka Manohar, was arrested on Saturday, for allegedly injecting his HIV-positive blood into a woman's body after she refused to marry him in Medchal-Malkajgiri district, officials said on Sunday. The victim's father, Chiranjeevi, filed a complaint with the Pocharam police, leading to Manohar's arrest at NTPC X Road, Annojiguda.