As West Bengal saw widespread violence over protests against the new citizenship law and the NRC, Chief Minister Mamata Banerjee on Saturday appealed to people to use democratic means of protest and warned that action would be taken against those taking law into their hands.

"Agitate by using democratic means, but don't take the law in your hands, don't indulge in road or train blockade," Banerjee said in an appeal.

The Chief Minister said none of the trouble-makers would be spared.

"We won't tolerate if common people are made to suffer. Those who are creating disturbances, hitting the streets to take the law in their hands, none of them would be spared," she said.

"We will take steps as per the law against those torching buses, stoning trains and destroying government property," she warned.

The chief minister's appeal came after violent protests against the new citizenship law (CAA) spread to more areas in the on Saturday as mobs torched buses, set afire railway property and blockaded road and rail disrupting train and vehicular movement.

The unrest began on Friday when the protests vandalised and set fire to railway stations and squatted on the tracks and highways.