Holding placards, the YC activists demanded strict punishment for Sen.
They also accused the Mamata Banerjee government of having links with the Saradha group and demanded action against TMC MPs whose names figured in the scam.
Police swung into action and removed the YC activists and cordoned off the area.
The YC alleged that the police lathicharged a peaceful protest.
Police and RAF personnel were deployed in strength outside the court premises.