An assistant executive engineer in the Karnataka electricity department is among six arrested for the murder of assistant conservator of forest Madan H Nayak,who was killed on May 6.
The family members of a police sub inspector are also named in the FIR.
Nayak was attacked by 15 revelers near a resort on the river Kali,near Dandeli in Karwar,after he objected to the group attracting crocodiles to the river shore for a feeding frenzy. He died of head injuries on Wednesday.
The accused have been identified as government officials and relatives of state government employees.
The police have so far arrested assistant executive engineer Anand Lamani Nayak and three businessmen Prashant Lamani,Suresh Nayak and Aravind Babu Chawan.