The 23-year-old woman was forced to work as a prostitute in the Sicilian coastal city of Messina, but a female friend used Facebook to alert the outside world to the woman's plight.
"The victim managed to escape from her tormenters with the help of a friend of hers, who raised the alarm on Facebook," police said in a statement.
The woman had been forced into prostitution earlier this year by a 55-year-old man named as T O, who was arrested along two other men from eastern Sicily, SA, aged 41 and I D, aged 48.
She had begun a relationship with S A, who is married with three children. But when S A discovered she was working as a prostitute, he mistreated her, taking her earnings and beating her when she refused to have sex with him, according to police.
