A gang of armed robbers looted divisional telephone exchange office in the district town early Wednesday. The gang took away Tk 3000 in cash, two bicycles and other valuables from the employees of the exchange. Sources said the masked robbers numbering 10/12 swooped on the exchange office at around 4am and took senior telephone operators Sima Rani Dash, Rabeya Khatun, Line man Mujibur Rahman and guard Abdur Razzak hostage at gunpoint. Later, they damaged revenue section, optical mask room, rectifier room and furniture and some important documents of the office.