A total of 37 people are suspected of violating the national drone flight rules in the year since the revised Civil Aeronautics Law took effect in late 2015, the National Police Agency said Thursday. Of the 36 cases in which police had taken action by the end of last year, most involved unmanned flights over prohibited areas, with the rest concerning breaches of regulations on appropriate drone use. The law was revised to regulate unmanned flights after a small drone carrying radioactive material was found on the roof of the prime minister's office in Tokyo in April 2015. The law allows police officers to destroy drones, if necessary. The revision was first applied in Shikoku in January 2016 against a male photographer who flew a drone over a crowded residential area in Takamatsu without authorization.