In a special drive against defective number plates, the Karnataka police have booked 19,448 cases across the State over the last three weeks. Of them, 9,684 cases were booked in Bengaluru only, the highest for any district in the State.Bengaluru was followed by Mysuru city with 634 cases, Mangaluru city with 550 cases, Belagavi city with 527 cases and Hubballi - Dharwad with 405 cases.Alok Kumar, Commissioner for Traffic and Road Safety, said that motorists with defective number plates or without number plates, used to dodge law enforcement authorities committing traffic violations. Such vehicles have been involved in accidents and even committed criminal offences. “Defiance of law and manipulation must be dealt with firmly,” he said explaining the rationale behind the special drive launched across the State.