The balloting began at 7 am and will continue till 5 pm.
A total of 141,251 electorate, including 69,328 women, are eligible to exercise their franchise in the Lok Sabha seat, where 13 candidates, including a woman are contesting.
The Election Commission has decided to conduct the re-polls in 168 polling stations in 26 Assembly segments as electoral malpractices were found during voting in the first phase of the ongoing general elections on April 11.
A record number of over 7,000 security personnel, comprising central para-military and Tripura State Rifles, have been deployed to hold the free and fair re-polling.
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