Even after the repeated assurance of the Election Commission's claims that Electronic Voting Machines (EVMs) cannot be tampered with, the UDF workers alleged that whenever someone voted for the hand symbol of Congress candidate, LED lamp of BJP's lotus symbol flashed at the booth no 151 set up at the Madhava Vilasam School, near Chowara, in Kovalam. The UDF workers alleged that the malfunction of the EVM came to notice after 76 persons polled the votes and they have forcibly stopped the polling process in the booth.