SHILLONG, June 17: Shillong traffic police has conducted a special drive against increasing rash riding by underage bikers in the city. A total of 261 cases were detected in the drive where 19 were underage. Police said that the guardians were summoned to the police station and pelized with fine in case of underage riding. An amount of Rs. 89,500 was realized as fine. This was in addition to other regular fines imposed for other traffic violations by other violators.