Palermo, October 19 – The suspected killer of 17-year old Carmela Petrucci, who was stabbed to death in Palermo on Friday, was arrested at a nearby train station in Bagharia on Friday. The 22-year-old was said to be a former boyfriend of the girl's sister, 18-year-old Lucia Petrucci, who was severely injured in the attack and is currently being treated in hospital for serious injuries. The sisters were reportedly attacked in the hallway of the building where they both lived, where police found them lying in a pool of blood. Police had been called by a neighbour in the building. The survivor reportedly helped identify the suspect to police. The motive is not yet clear.