Across the country, there have been confirmed cases of fraud in which individuals impersonate police officers and demand that cyclists pay money on the spot under the guise of enforcing traffic laws against bicycles, thus exploiting the system of issuing traffic violation notices for cyclists (the so-called "blue ticket" system).
Police officers will absolutely never collect a fine on the spot!
If you encounter such a situation, do not pay any money and immediately contact the police, such as by calling 110.