"We intercepted two vehicles heading towards Kengeri in Bangalore Rural district and seized the unaccounted cash in the denominations of Rs 1000 and Rs 500," they said.
The accused, residents of the city, were booked under various sections of the CrPC and IPC, police said, adding, they were investigating the case with income tax officials to find out the trail of the cash.
The bypolls are being held following the resignations of JD(S) MPs H D Kumaraswamy and N Cheluvaraiswamy after getting elected to legislative assembly in the May five elections.