The protests were carried out by BJP youth wing workers and were led by its leader Anurag Thakur, who is the son of Prem Kumar Dhumal, a former chief minister of Himachal Pradesh.
Mild force and water cannons were used by the police to disperse the crowd, which tried to jump over the barricades.
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On Monday, senior BJP leader Arun Jaitley had accused Singh of corruption. Jaitley suggested that Singh extended favours to a power company in exchange for monetary compensation to him and his family.
Jaitley, who is the leader of the Opposition in the Rajya Sabha, said a hydel power company, Venture Energy and Technology Private Limited or VETPL, was given an extension of 10 months by Singh’s cabinet to complete a hydel power project in Sai Kothi, even though the company had defaulted in the past.
The BJP leader said this favour was extended as part of a deal between the power company and the Himachal chief minister.