Right to Information activist, Arvind Kejriwal and seven others were arrested on Saturday, after they held a protest at the sub-registrar's office and blocked a road leading up to it in Noida.
Kejriwal, leading a group of 60 people to protest against alleged inaction by the authorities on a police complaint, was later released.
He was arrested under IPC section 151 for ignoring the command to disperse, police said. The seven others were released after they signed a bond but Ramon Magsaysay Award winner Kejriwal refused to do so.
He was freed this evening.
They were protesting against the alleged inaction of the authorities on a police complaint filed by an NRI who was mishandled by a staff member, when he went to the sub-registrar office to lodge a complaint against a government employee for demanding a bribe.