Acting Chief Judicial Magistrate Tanima Das ordered six days' police remand for Gurupada Manna and Bhim Karan and 14 days' judicial custody for others.
Police had yesterday detained 12 persons in connection with the murder of a Trinamool Congress worker Joydeb Jana (30) at Dubrajpur under Sabang assembly constituency in West Midnapore district which goes to poll on Monday.
While 11 of them were later arrested, another was let off after interrogation.
Jana was attacked with sharp weapons, lathis and iron rods by a group of men allegedly belonging to Congress and CPI(M), when he was returning home on Friday night, a senior police official earlier said.
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Jana's wife lodged an FIR with the Sabang police station against 22 people including former minister and Congress candidate for Sabang Assembly seat Manas Bhunia.
Local Trinamool Congress leader Amulya Maity alleged that Jana was beaten to death in the presence of Bhunia, which was denied by Congress leaders.