The Boston Police Department’s Internal Affairs Division is investigating a racist video that appears to feature a police officer, with the tag line, “This summer, black people have met their match,’’ according to a police spokesman.

The video, first reported by Fox 25 News and the Boston Herald, was obtained by the Globe, and is shot like a movie trailer. It shows shots of a police officer and opens with the setup: “In the fight between good and evil comes an unlikely pair.’’

It then shows images of the officer, as well as a dog wearing a cast. The pair is described as an “inept cop’’ and “a dog with a limp.’’ It then shows the “black people have met their match’’ tag line and a picture of black women.

“The content of the video is upsetting and not in keeping with the Department’s philosophy of community policing,’’ Boston police spokesman Officer Stephen McNulty said in a statement Saturday. “The Boston Police Department expects all our officers to exercise sound judgment and behave in a manner that reflects positively on themselves and the department. Officers are expected to act in a way that fosters strong community relationships and trust across the city.’’

The video was brought to the attention of the department on Thursday morning, McNulty said, and was immediately turned over to Internal Affairs. Investigators are looking into questions about its origin, including who shot it and whether the officer pictured was involved. The investigation is “active and ongoing,’’ McNulty said.

“It’s very disturbing,’’ said Darnell L. Williams, president of the Urban League of Eastern Massachusetts. “Very troubling. Unnecessary and hurtful. It crossed a line when they mentioned race and they categorized all black people.’’

Williams said there were too many unknowns about the video, which had been circulating within the department, for him to comment on what consequences were appropriate for the officer pictured. But he said that any interaction a person of color had with that officer was rendered suspect by the video.

“It would tell me, if you got a good lawyer, you’ve got a good case that that person was biased,’’ Williams said.

Detective Larry Ellison, president of the Massachusetts Association of Minority Law Enforcement Officers Inc., said the video was yet another reminder that on matters of race, “we’re not there yet.’’

Ellison said he’s been bombarded with questions about the video from outraged officers and members of the public. “I think it sends a message of division,’’ he said. “In that somehow, there is a separate way of policing different groups of people.’’

Evan Allen can be reached at evan.allen@globe.com.