Central Bureau of Investigation (CBI) on Wednesday kicked off a full-fledged investigation into the multi-crore municipalities recruitment scam in West Bengal by conducting simultaneous raid and search operations in different pockets of the state. Simultaneous raid and search operations were conducted at the offices of different municipalities in North 24 Parganas, Hooghly and Nadia district. Another team of CBI officers also conducted raids at the residence of private real estate promoter Ayan Sil, who is currently in judicial custody for his alleged involvement in the scam.