Some protesters were taken into custody, police said.
The curfew was imposed in the town in the wake of large-scale violence yesterday.
Vizianagaram, a town in coastal Andhra, has been roiling since the Union Cabinet's October 3 decision to create the state of Telangana out of the state of Andhra Pradesh.
“Lot of violence was reported, with the protesters indulging in arson, looting shops, setting a bank on fire, and damaging public and private properties. In view of the violence, authorities ordered a curfew late last night,” Dwaraka Tirumala Rao, IGP (North Coastal Zone), told PTI.