An indefinite curfew has been imposed in Tank, South Waziristan today. The security forces are conducting search and clearance operation in the area. Sources said the curfew was imposed in wake of the news that two suicide bombers have entered the city. The public is facing miseries due to the curfew whereas the students remained unable to appear for the Intermediate examination in Dera Ismail Khan. The security forces have blocked Tank, Jandola, DI Khan, Bannu and Wana Road.