Aslam Bahar Bulbul, the officer-in-charge of Sadar Police Station, has been attached to the District Police Lines on charge of negligence of duty.   Sheikh Maniruzzaman Mithu, spokesperson of Khulna Metropolitan Police (KMP), informed the matter on Sunday.   Besides, Ashraful Alam, officer-in-charge of Harintana Police Station, has made the OC of Sadar Police Station, said Mithu.   The action against the OC has been taken following the demand of a group of doctors, he said.