It shall be the duty of police officers of a city of the metropolitan class to report to the chief of police any defect in any sidewalk, street, alley, or other public highway, the existence of ice or dangerous obstructions on the walks or streets, a break in any sewer, any disagreeable odors emanating from inlets to sewers, or any violation of the health laws or ordinances of the city. Suitable forms for making such reports shall be furnished to the chief of police by the city department of public works. Such reports shall be transmitted by the chief of police to the proper officers of the city. In case of any violation of laws or ordinances, the police officer making report shall report the facts to the appropriate prosecuting authority. Such police officers shall also perform such other duties as may be required by ordinance.