The CBI, which submitted the status report, said that out of 64 cases referred to it by the state police, 39 alleged offences were taken over by the central agency.
Alleging that Dhurjati Saha suffered head injuries in an attack on May 2 in the Magrahat Paschim constituency, his wife and son demanded a CBI investigation into the incident.
Senior advocate Kapil Sibal, appearing for the state government, pointed to the members of the committee that has been formed to investigate the incidents.
In his letter to Banerjee, Chowdhury said that atrocities were committed by the ruling party's cadres on Congress supporters in the Raninagar-II block in Murshidabad district.
The two accused -- Bijoy Ghosh and Asima Ghosh -- were briefly detained before being arrested by the probe agency, they said.
It was also alleged a Trinamool Congress worker was injured in firing by central forces who were with the BJP candidate who, however, denied the charge.
A Congress worker was stabbed to death in Balikuda-Erasama area of Jagatsinghpur seat in West Bengal while he was returning from a polling booth.
Days before death, West Bengal BJP men had been threatened; victims’ kin suspect involvement of locals
Trilochan and Dulal were threatened by unknown persons a few days before their deaths as both were leaders of BJP’s Booth Raksha Committee.
Hours before polling even began, CPM workers Debu Das and Usha Das were allegedly burnt to death by TMC workers while they were asleep.
West Bengal panchayat elections UPDATES | 14 dead in poll-related violence, Home Ministry seeks report
The five dead include a CPM worker and his wife who were burnt to death, hours before polling even began.
The Asansol-Raniganj belt had witnessed clashes between two groups over Ram Navami celebrations, resulting in the death of one person.