This online news platform understands that the Police Chief Tim Gannon and Officer Kim Potter quit the Brooklyn Center force two days after the death of Daunte Wright sparked two nights of unrest.
She says she mistook her gun for her Taser as he tried to escape arrest.
It happened in a suburb of Minneapolis, a city already on edge for the ongoing trial of an ex-police officer accused of murdering George Floyd last year.
Speaking to reporters on Tuesday, Brooklyn Center Mayor Mike Elliott said that he had appointed 19-year veteran Tony Gruenig to take over for Tim Gannon.
On Monday, Mr Gannon had said that the shooting of Mr Wright appeared to be an “accidental discharge” after Mrs Potter mistook her service pistol for a stun gun.
“I appreciate the officer stepping down,” the mayor said, adding that he hoped her leaving would “bring some calm to the community”.