All four persons, including state minister Sabitri Mitra's son-in-law Samadip Sarkar alias Tinku, accused of beating up Election Commission personnel in Malda's Manikchak area were arrested on Friday.
The Malda district administration had lodged two FIRs at the Manikchak police station yesterday after being directed by the Election Commission to take immediate action.
The three other arrested persons are Motiur Rehman, Muklesur Rehman and Jamal Khan. While the first two were arrested from the Malda town's Rathbari area, the two others were nabbed from Rabindra Avenue, Malda SP Rupesh Kumar said.
On Thursday, two persons were arrested, though they were not mentioned in the FIR, the SP said. They were produced on Friday in the CJM's court which remanded them in two days' police custody.
A four-member team of EC personnel were videographing a motorcycle rally of Trinamool Congress workers when two of them were thrashed by the activists, provoking the election authority to ask the district administration to take stern action.
Motorbike rallies are banned under rules framed by the Election Commission.