A senior Customs officer yesterday criticised the film industry after his colleagues were forced to hand over about 30,000 suspected pirated copies of a film. Officers raided a Kowloon factory last week and seized copies of the film due to be released in cinemas the next day. Several people were arrested. But about eight hours later, the maker of the film presented an authorisation letter, saying the factory was legally manufacturing the copies. As a result, the suspects were released and the discs returned to the owner. 'According to film industry practice, copies of a movie can only be manufactured six months after the film is premiered,' Customs Intellectual Property Investigation chief Calvin Leung Ho said. 'We are confused and disappointed by the film industry. We demand a movie-maker explain the code of practice to us,' Mr Leung said.