The West Bengal unit of the BJP asked CM Mamata Banerjee to reconsider her proposal for resumption of metro rail services in the metropolis.
BJP termed it a "disastrous proposition" as it might endanger the lives of common people.
Mamata Banerjee had recently requested for the metro services to restart from July 1.
State Chief Secretary Rajiva Sinha on Tuesday urged Union Home Secretary Ajay Bhalla in a letter to allow the resumption of limited metro rail services in Kolkata.
While due to the COVID 19 pandemic, metro services are not available anywhere in the country.