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"Stones were pelted at our party office and cars parked outside. More than 10 BJP workers suffered severe injuries," Ghosh said.
Police sources said that a huge police contingent was rushed to the spot and the situation was brought under control.
An hour before this, a clash had occurred between workers of the parties at the Jorabagan area in central Kolkata over a motorcycle rally by the BJP's youth wing to mark the birth anniversary of Swami Vivekanada.
The Bharatiya Janata Yuva Morcha (BJYM) has embarked on an eight-day motorbike rally which started from Contai, in the southern part of the state, to Coochbehar in the north where it is scheduled to end on January 18.
The BJYM alleged that they were attacked by TMC "goons" when they were trying to take out a rally from the Jorabagan area.
Local TMC MLA Smita Bakshi denied the allegations and said those "who were trying to gain a foothold in Bengal are behind the violence".
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)