Some of these bodies were found stuck on the waterbed and the others were floating, a senior official of the state administration said.
The passenger bus had rammed into the railing of a bridge and plunged into Gogra canal at Balirghat area of the district around 6 am yesterday.
The search operation that was called off last night due to poor visibility resumed at 7 this morning, the official said.
"The search will continue till the time we are convinced that there are no bodies stuck anywhere," he said.
"We have so far managed to identify 35 persons. The bodies of the six unidentified persons are kept in the morgue of Murshidabad Medical College and Hospital. We have been receiving calls from relatives of passengers," he added.
There is no confirmation on the total number of passengers travelling in the bus, but it could be around 50, Murshidabad District Magistrate (DM) P Ulaganathan told PTI.
Those rescued are undergoing treatment at the Murshidabad hospital, he said.
Asked about eye witnesses' claims of the bus driver speaking on his phone while speeding, the DM said, "It is still not clear what the reason was. But there was fog in the morning and visibility was poor. We are looking into the matter."
Another state administration official said forensic tests would be conducted on the bus to ascertain the causes of the accident.
"Forensic experts will check whether there was any problem with the engine of the bus," the official said.
Expressing grief over the accident at a programme on the outskirts of Kolkata, West Bengal Governor K N Tripathi today urged people to join 'Safe Drive, Save Life' campaign of the state government.
Banerjee, who stayed back at Baharampore last night, had announced a compensation of Rs 5 lakh each for the family of those killed in the accident, Rs 1 lakh for the critically injured and Rs 50,000 for the injured.
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