By A Staff Reporter : Kolkata is surrounded by tight security ahead of Sunday's election. The route march of Kolkata Police has already started at various places. Out of a total of 4,959 booths in 200 meters, section 144 has already issued since Friday. The border has been sealed. Bike ralley has been banned. The commission has instructed to inform the police. The helpline number has been issued by the administration. The number is 1950.