The BJP leader, who hails from the Gaddi community, was accompanied by a few dozen of his supporters.
A clash ensued and 3 persons were injured, police said, adding 20 people were arrested in this connection.
Kapoor, however, alleged that the police lathi-charged the BJP workers.
The chief minister had courted controversy a couple of days ago while taking a dig at state BJP chief Satpal Satti. Singh had said, "What if Satii is the president (of BJP). Gaddi people also have a president".
In a clarification, the chief minister said his statement was "misinterpreted".
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)