"We have submitted complaints supported by video footage before Chief Election Commissioner V S Sampath about the manipulation in the polling," Trinamool Congress chairman Ratan Chakraborty said at a press conference here.
He said, "The high turnout - an average of 85 per cent - was the result of large-scale manipulation in the voting compartments during polling on April 7 and April 12."
"FIR against a presiding officer of a polling booth in Bishalgarh sub-division of West Tripura Lok Sabha seat is a proof that large-scale rigging occurred in several booths," he said.