Ballotting began Saturday for by-elections in Assam's three assembly constituencies - Silchar, Lakhipur and Jamunamukh, officials said.
By-election for Silchar was necessitated after Congress legislator Sushmita Dev's election to the Lok Sabha.
The Lakhipur seat fell vacant after the death of sitting legislator and former minister Dinesh Prasad Goala, while the Jamunamukh seat was vacated by AIUDF leader Sirajuddin Ajmal after being elected to the Lok Sabha from Barpeta.
As many as 25 candidates are in the fray - 12 are contesting in Silchar, five in Lakhipur and eight in Jamunamukh.
Over five lakh electors, including more than two lakh women, will be able to exercise their democratic right at 588 polling stations.