The TMC, however denied the Congress allegations and said the elections have been peaceful.
An average of 81 per cent polling was recorded till 5 pm, with 77 and 81 percent in Cooch Behar and Tamluk Lok Sabha constituencies and 86 per cent in Monteswar Assembly seat, the Election Commission said.
Accusing the ruling TMC of "letting loose a reign of terror" in the by-polls in Monteswar, state Congress President Adhir Chowdhury announced in the afternoon that they were withdrawing their candidate Bulbul Ahmed Sekh.
"They have unleashed a terror across Monteswar seat, they have turned the election into a farce. They are not allowing our polling agents to enter the booth, there is no use of fighting the polls. So we have decided to withdraw our candidates," Chowdhury said.
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"We have forwarded the complaint to the District Magistrate to look into the matter," the EC official said.
The CPI(M)-led Left Front and BJP too echoed the views of Congress and alleged that elections have been turned into farce in Coochbehar Lok assembly segemet as well.
The BJP demanded repoll in several booths in all the three constituencies.
Rubbishing the allegations, The TMC said the elections have been peaceful.
"The elections have been peaceful. There have been no incidents of violence. People have voted in favour of the development that has taken place under TMC regime," TMC vice-president Mukul Roy claimed.