A clash broke out between two factions of BJP at Beliaghata in the eastern part of the city on Friday afternoon.
Police said that it was around 3.50 pm when they heard sounds of explosions. They came out of their houses to see what went wrong and found some youth hurling bombs.
Preliminary investigation revealed that Avijit Sarkar, a BJP worker, residing in a house in the narrow Sitalatala Lane at Beliaghata had some difference of opinion with a section of party workers in the area which led to the trouble.
Sarkar alleged that he was attacked by another worker of the party Tuhin Roy and his associates.
He refused to follow them and wanted to convey his message to senior leaders of the party. But before he could have managed to lodge his complaint with senior leaders, he was attacked by members of his rival group.
He was pulled out of his house and beaten up mercilessly till he fell on the ground. In the scuffle, he received deep injuries on his head.
Members of the victim's rival groups fled finding some people approaching.
He was taken to a local healthcare centre and discharged after first aid.
Local people raised a protest against such incidents in the area. A housewife said: "We were having food in the ground floor room of our house. Suddenly, we found people running in search for a safe place as the situation turned worse within a minute. Finally, the situation came under control when police reached the spot."
"We do not want such incidents in the area again and we would urge the police to take necessary steps to avoid repetition of such incidents," said a local resident.