A Chicago cop fatally shot two people early Saturday while responding to a domestic disturbance, adding to tensions in a city already roiled by recently released video of a white officer shooting a black teenager.

Police did not identify or reveal the race of the cop in the latest shooting, in which the officer killed a 19-year-old college honors student and a 55-year-old mother of five who was his neighbor in the doorway of a West Side apartment building.

Both victims are black.

The officer had been responding to an emergency call made by relatives about the student allegedly threatening his dad with a metal baseball bat, according to local news reports.

The cop was “confronted by a combative subject resulting in the discharging of the officer’s weapon,” police said.

The victims, Quintonio LeGrier and Bettie Jones, were pronounced dead at different hospitals within an hour of the shootings.

The police late Saturday issued a statement admitting Jones had been “accidentally struck and tragically killed.’’

It said it “extends its deepest condolences to the victim’s family and friends.’’

Jones was a neighbor who had been asked by LeGrier’s father, Antonio, to watch for the cops’ arrival.

The dad told the Chicago Sun-Times that the cop who shot the two appeared to be either white or Hispanic — and knew immediately that he had “messed up” in firing at the two victims.

“F–k, no, no, no!” the cop said as he stood on a patch of grass 30 feet from the bodies, Antonio LeGrier, 47, said.

“I thought he was lunging at me with the bat,” the ­officer yelled, the distraught father said.

“In my opinion, he knew he had messed up. It was senseless,” LeGrier said.

“He knew he had shot, blindly, recklessly into the doorway and now two people are dead because of it.”

The Chicago police remains the subject of a federal civil-rights investigation prompted by the recent release of video showing white Officer Jason Van Dyke shooting Laquan McDonald, 17, 16 times in 2014.

Van Dyke is scheduled to be arraigned Tuesday on a charge of first-degree murder and one of official misconduct.

The shocking video, which showed some of Van Dyke’s bullets striking McDonald as he lay on the ground — prompted protest marches and calls for the resignation of Mayor Rahm Emanuel.

Officials said McDonald was armed with a three-inch knife, but video showed him veering away from police from a distance of 10 feet as he was shot.

Police released scant details of Saturday’s shooting.

But at least one family member said the officer had fired into a closed door.

Jones’ cousin, Evelyn Glover, said Jones was with LeGrier when they were shot through the door of Jones’ first-floor apartment.

A bullet hole pierced the wooden door, Reuters reported, and blood stained the walls and carpet in the tidy apartment, decorated for Christmas.

LeGrier’s mother, Janet Cooksey, told the Chicago Tribune that her son, who was studying engineering at Northern Illinois University, was battling mental illness.

With Post Wires