The deceased Dahekar was the leader of Yuva Shakti Shanghatna, they said.
Police said the accused Swapnil Wakde allegedly stabbed Dahekar in the market area around 8:30 AM when the latter was buying grocery.
Police suspect old political rivalry to be the cause behind the murder as Dahekar was a member of Talodhi (Naik) Gram Panchayat.
Wakde was arrested and booked under section 302 (murder) of IPC, they said.