He said it was the second attack on the BJP leader in that state.
Sidhu was one of the most vocal critics of the Badal and Deputy CM Sukhbir Singh Badal and it was "at their behest" that he was denied ticket in the last Lok Sabha election from Amritsar from where he had been victorious thrice, Bajwa said in statement released here.
Such attacks were against all norms of democracy and it was an "authoritarian" tendency to crush dissent, he said.