Several chemist shops were put on fire by a group of medical students of Darbhanga Medical College in Bihar on March 11. The fire tenders were rushed to the spot to douse the flames. Four personnel have been injured during the incident. Clash erupted after a student allegedly demanded drugs and the shop owner denied giving the same. The Darbhanga drug dealers' union has been sitting in protest since March 12 demanding the arrest of all the accused.