State minister Chandrima Bhattacharya said she has heard about the death of five persons but it is yet to be confirmed.
NDRF DG Sanjay Kumar said earthmovers are being used. "We have to take into account the safety aspect while clearing the debris", he said.
Another minister Firhad Hakim said efforts are being made to find out any trapped person under the debris.
After the rescue work is over "we will undertake technical inquiry", he said.