Four police officers, including the officer-in-charge of Dhamoirhat Police Station in Naogaon, have been withdrawn after HSC exam question paper boxes were found open inside the station. Two officers had already been removed earlier in connection to the incident. Reports indicate that a drug suspect held in the lock-up accessed the boxes, tearing and scattering the papers. The matter came to light the following morning, prompting administrative action over negligence.