As many as 1.35 lakh police personnel -- 60,000 from the state, 20,000 home guards and rest from central paramilitary and neighbouring states -- have been deployed for the single phase poll in which more than 4.36 crore people are eligible to exercise their franchise.
Polling which commenced at 7 AM would continue till 6 PM with the timing extended by an hour in 223 Assembly segments of the total 224. Election in Periyapatna was countermanded to May 28 following the death of BJP candidate.
Some poll surveys have predicted anti-incumbency swing against the BJP's first ever government in the South that they say would propel the Congress to be the single largest party or be within the striking distance of seat of power.
JDS is hoping to break new grounds beyond its stronghold in the old Mysore region, while KJP is aiming to play spoiler to BJP's chances. Both are fancying for themselves the role of a "king maker" in the event of a fractured mandate.
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Electoral authorities have set up about 52,000 booths of which about 10,000 have been identified as hypersensitive and more than as 14,000 as sensitive, which would come under the watchful eyes of officials with the help of web cameras.
As many as 65,000 electronic voting machines, which include about 10 per cent kept as reserve, are being used in the elections for which more than 2.5 lakh polling officers are on duty.
The Election Commission and a number of NGOs have joined hands for vigorous campaigns to boost the voter turnout, particularly in the country's IT capital of Bangalore.