The youth was identified as Pavitar Singh, an Akali worker of Chet Singh Wala village in the district, police said.
The poling officer, a home guard jawan and a constable were also injured in the clash that took place last night.
A case of murder was registered against police inspector Gurcharan Singh and winning sarpanch Parminder Singh (a supporter of Akali Dal MLA Deep Malhotra), SSP Gurmeet Singh Randhawa said.
Police also registered a case against Inderjit Singh who lost Sarpanch election and others for assaulting polling officer.
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The incident took place last night when the polling officer declared Parminder as Sarpanch and Inderjit Singh protested and asked the officer for recounting, police said.
After this Inderjit and others were involved in a verbal duel with polling officer and staff.
A mobile poll police party rushed to the spot where the two groups were protesting and raising slogans.
The SSP said that cases had been registered against both the parties.