The Trinamool Congress leader, who was shot at by unidentified miscreants in Titagrah area in the northern fringes of the city, died Tuesday at a private hospital here.
Four persons - identified as Bhola Prasad, Kala Munna, Sanjay Das and Seikh Samir - were arrested from different parts of Barrackpore Police Commissionerate area during series of raids since last night in connection with the fatal attack on TMC leader Satish Mishra on Monday afternoon, a senior police official of the Commissionerate said.
Mishra was shot at from close range by bike-borne assailants before a Kali Puja pandal off B T Road at Brahmastan area in Titagarh.
Mishra, who suffered bullet injuries on chest, was operated upon on admission but the bullet could not be retrieved from his body and he died in the early hours of Tuesday, the official said.
He said police was scanning the CCTV footage of the area.
The news of his death triggered tension in the area as a strong police force and RAF kept vigil at the spot.
Local TMC MLA Arjun Singh earlier accused BJP of being involved in the incident. "BJP and its goons have carried out this incident. They are trying to gain a foothold in the area and that is the reason why they are trying to terrorize us," Singh had alleged.
State BJP president Dilip Ghosh, however, termed the allegations as "baseless and concocted".
"This is nothing but a result of infighting within TMC. The same thing has been happening in various parts of the state," Ghosh countered.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)