Four more persons suspected of having links with a Hindu outfit have been arrested in connection with the murder of a 28-year-old Pune IT professional, the police said.br With the fresh arrests made late last night, a total of 17 people have been arrested in the case involving the murder of Shaikh Mohasin Sadiq in Bankar Colony in Hadapsar area of the city on Monday night.br The arrested are said to be linked to Hindu Rashtra Sena, a right wing organisation.br Thirteen persons, earlier arrested by police in this connection, have been booked for murder, attempt to murder and rioting.