Kolkata, April 30 -- Political temperature rose again in Kolkata, a day after the conclusion of second and final phase of polling for assembly polls as Trinamool Congress alleged "opening of ballot boxes without the presence of any relevant party stakeholders" and party leaders staged a dharna.

Elections Commission officials denied Trinamool Congress allegations and BJP leaders accused the ruling party in the state of spreading rumours. Trinamool Congress leaders later ended the dharnaoutside Netaji Indoor Stadium.

TMC leader Kunal Ghosh called the incident "a mistake of EC" and said that it was decided that the security outside the strong room will be tightened, nobody will break open the seal or enter without informing officialy.

"Wh...