The Metro 3 work seems to have laid low some of the state's top bureaucrats and ministers who stay in the plush Mantralaya precinct. After families residing in the twin towers Suruchi and Suniti close by started being hit by dengue and malaria, BMC conducted an inspection of the Metro 3 pits and found larvae of the dengue virus in them. The BMC is expected to serve notice to the Metro authorities by Thursday.

Sources said the larvae of the dengue virus was also found in a canteen in the vicinity and the back area of a neighbouring auditorium. The area is frequented by lakhs of officegoers every day, visitors, the chief minister and his council of ministers. The scare could turn into an alarming problem for civic authorities if not tamed as the footfall will increase further during the monsoon session of state legislature that begins from June 17 at the Vidhan Bhavan.