The assailants, who were in a car bearing a Haryana registration number, fired three shots at Lucky who was riding a motorcycle.
He was rushed to a hospital where doctors declared him brought dead.
Solan Deputy Commissioner, Rakesh Kanwar said the culprits have been tracked.
The incident triggered protest in the town and a mob gathered at the hospital where the victim was rushed to.
Additional District Magistrates (ADM), Sandeep Negi said a doctor on duty had sought police protection for the staff in view of the protests.
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