"Around 49 per cent voter turnout has been recorded in Rajkot (West) Assembly seat (by the deadline at 6 PM)," Gujarat Joint Chief Electoral Officer Ashok Manek told PTI.
The final figures will be released tomorrow, which may give the clear account of today's polling, he added.
The polling passed off incident-free with no report of violence, said Returning Officer B R Chaudhary.
Rajkot (West) has around 2.90 lakh voters among whom Patel community (both kadva and leuva) accounts for 45 per cent.
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While Congress nominated Jayanti Kalaria, a Patel strongman, BJP fielded former Rajya Sabha MP and senior party leader Vijay Rupani in the seat.
Anandi Patel, who succeeded Narendra Modi as chief minister after the latter's ascension to Centre, had termed the bypoll a prestige issue for BJP.
The campaigning for the bypoll was rocked by a controversy when some 'defamatory' leaflets were distributed against Rupani following which some BJP members lodged a police complaint against sitting Congress MLA from Rajkot-three seat, Indranil Rajyaguru.
While Vala cast his vote at a polling booth in a community hall here. BJP candidate Vijay Rupani exercised his franchise at a school in Jivannagar area. His Congress opponent Jayanti Kalariya cast his vote in a booth in Panchvati Housing Society premises.