Sub-inspector Asaduzzman of Tejgaon Police Station filed a case against around 500 workers and six officials of the factory on Sunday night as they assaulted the members of the mobile court during a drive against food adulteration and unhygienic condition on the day.

The police raided the factory and some officials' houses several times, but no one was arrested, said SI Monsur Habib, investigation officer of the case.