The Bharatiya Janata Party (BJP) claimed that its supporters were attacked by Trinamool activists when they were on their way to attend newly inducted leader Suvendu Adhikari's roadshow at Nandigram in Bengal's Purba Medinipur district.
The police, however, said that a fight broke out between locals and a group of people but the situation was soon brought under control.
Local BJP leadership alleged that several party supporters were injured in the attack.
"Some of our men had to be hospitalised, while a few are missing," a BJP leader said.
Mr Adhikari said: "The TMC will have to face consequences. I will not take it lying down."
The ruling party in the state, however, claimed that none of its activists were involved in the attack.
East Bengal FC Suffer 2-3 Defeat Against Turkmenistans Altyn Asyr FC East Bengal Lose To Altyn Asyr, Out Of AFC Champions League 2 East Bengal vs Altyn Asyr Live Streaming, AFC Champions League 2 Live Telecast: Where To Watch Match 2 French Rafale Jets Collide Mid-Air, Instructor, Pilot Missing Cops Post Rioters' Pics After Vandalism During Kolkata Rape-Murder Protest Ayatollah Khamenei Warns Of "Divine Wrath" If Iran Backs Down Against Israel Human Parvovirus B19 On The Rise In US, CDC Warns Of 'Slapped Cheek' Virus Rabindranath Tagore's Handwritten Translation Of "Jana Gana Mana" Goes Viral Ola Roadster Electric Motorcycles Launched, Prices Start From Rs 74,999 Track Latest News Live on NDTV.com and get news updates from India and around the world.