Cities of the second class and villages shall have the power to (1) prevent and restrain riots, routs, noises, disturbances, or disorderly assemblages, (2) regulate, prevent, restrain, or remove nuisances and to designate what shall be considered a nuisance, (3) regulate, punish, and prevent the discharge of firearms, rockets, powder, fireworks, or any other dangerous combustible material in the streets, lots, grounds, alleys, or about or in the vicinity of any buildings, and (4) arrest, regulate, punish, or fine all vagrants.
Neb. Rev. Stat. §§ 17-556