Ramaswami: The Election Commission (EC) has expressed concern over the present situation in the state and warned some district magistrates and superintendents of police to be impartial. The commission held a meeting with DMs and SPs on Saturday, during which it reviewed their work with regard to poll preparations. It instructed police officers to enforce the Model Code of Conduct strictly and remove all unauthorised banners, posters, festoons and flags, said a senior EC official on condition of anonymity.