The Vasai police have arrested a 30-year-old man for allegedly stalking a woman online via Facebook and harassing her. The police, during the investigation, found that the man is a serial offender and four similar cases were registered against him in the past couple of years. He mostly targeted working women or those whose husbands worked abroad, said the police on Wednesday.

Roger Dias was arrested on Tuesday night after the 35-year-old woman filed a complaint on Monday. The woman, a housewife whose husband works abroad, alleged that Dias sent her a message on Facebook last year. "Hi, How are You, Looking Great," the message read, she said, adding that she did not reply.