The fate of 52 candidates will be decided by over 78 lakh voters of the state, where all the five seats -- Tehri, Pauri, Haridwar, Almora and Nainital -- are being held by the BJP.
The saffron party is locked in straight contests with the Congress on all seats.
Polling began at 7 am. Of the 78,56,268 voters in Uttarakhand, 3,71,220 are women and 259 belong to the third gender, Chief Electoral Officer Saujanya said, adding till 9 am the voter turnout was 13.34 per cent.
High-profile candidates in the fray are ex-chief minister Harish Rawat who takes on state BJP chief Ajay Bhatt in Nainital, ex-CM Ramesh Pokhriyal Nishank who faces Congress's Ambrish Kumar in Haridwar, BJP national secretary Tirath Singh Rawat is up against B C Khanduri's son Manish in Pauri and sitting MPs Ajay Tamta (Lok Sabha) and Pradeep Tamta (Rajya Sabha) in Almora.
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