The move came in the wake of several political parties complaining to the Election Commission, alleging that Virendra was inclined towards the ruling Trinamool Congress, sources said.
The Central Bureau of Investigation (CBI) has set up four teams, each headed by joint directors Ramnish, Anurag, Vineet Vinayak and Sampat Meena, to probe the political violence which ensued after the victory of the Trinamool Congress (TMC) on May 2 in a bitterly fought eight-phase assembly poll in West Bengal.