"Five persons suspected to have been involved in the attack on the woman MLA have been arrested from here," Superintendent of Police Pradip Pujari said.
Nath and her second husband were beaten up and injured when they were attacked on Friday night in a hotel by a group of people who were angry over her second marriage without divorcing her first husband.
The MLA and her second husband who were escorted to Guwahati have received medical treatment and were reported to be out of danger.
Nath has filed an FIR with th police alleging that a mob had attacked her on "political motivation".
Further investigation are continuing, Pujari said.