Celebrations, protests, rallies and counter rallies were organised on the streets of Kolkata and also several other parts of West Bengal, a day after the Citizenship (Amendment) Bill was passed by the Rajya Sabha, on Thursday (12 December).
While the Congress and a number of civil rights groups railed against the legislation, the BJP workers broke into celebrations outside their state headquarters on Muralidhar Sen Lane.
There were tense moments outside the office as a rally of the Congress workers protesting against the CAB passed the road while the celebrations were on there.
The two sides shouted slogans, threw sticks and water bottles at each other, but the police controlled the situation by creating a barricade between the workers of the two parties.
The police had some nerve-racking time after a few hours in the area when some students of Presidency University tried to march to the BJP office with copies of Constitution in their hands.
The police, however, stepped in and stopped them. The students said they wanted to give the constitution to the BJP leadership to make them understand they were flouting it by passing "divisive bills like the CAB".
A number of civil rights groups like Association for Protection of Democratic Rights and Banglar Sanskriti Mancha organised protests in various pockets of the state.
A torch rally was also organised by a civil rights group at South Kolkata's Park Circus against the Bill.
(This story has been published from a wire agency feed without modifications to the text. Only the headline has been changed.)