Duson police responded to a complaint of a "vicious" dog in the 500 block of 5th Street this evening.
Officers were told the dog, owned by someone nearby, attacked a person in the street.
When police arrived on scene at 7:13 p.m., the dog attacked an officer, according to Chief Kip Judice.
The officer then shot the dog, Judice says.
According to the police chief, any time an officer fires their weapon, the incident will be reviewed by the means of an internal investigation.
The dog is being picked up by Lafayette Animal Control.