Betul's Superintendent of Police (SP) Lalit Shakyawar confirmed the arrest.
Gyandev Lokhande became unconscious after the assault, after which a case under Section 307 of the Indian Penal Code was registered against those involved.
The accused beat up Lokhande yesterday while he clicked photographs of a meeting chaired by Yashomati Thakur, the Congress MLA from Tiwsa in Maharashtra, to shortlist a panel of candidates for polls due later this year, from five assembly seats in the district.
