Vigilante groups patrolling streets and public spaces in east Belfast nightly while targeting migrants is “greatly concerning”, a member of the Policing Board has said.
The issue is to be raised with Chief Constable Jon Boutcher.
Videos posted to social media show more than a dozen men patrolling areas in the east of the city.
They are stopping and questioning foreign nationals on their behaviour while asking for proof of their right to live in the north.
Some videos have also shown children taking part.
A member of the Policing Board and MLA for the area said he will raise the issue with the chief constable at the “earliest opportunity”.
One video posted online of a man approaching another man in a public park says the group represents “concerned parents” in the area.
Another video sees the poster telling a Syrian man “no more hanging about east Belfast, you have no reason to be there”.
In another encounter on the street, a migrant is told “too many of you are running around here and you’re stealing. There are women that are scared to leave their houses”.
Other videos make reference to there being “too many undocumented men” living in the area and comment on a lack of social housing due to the number of migrants that have moved in.
A social media page uploading videos of the confrontations claims to have set up a “rapid response team” to attend reports of suspicious behaviour within five minutes.
Alliance East Belfast MLA and Policing Board spokesperson Peter McReynolds said it was “greatly concerning”.
“There is absolutely no place for vigilantism in our society, or anyone taking the law into their own hands,” Mr McReynolds said.
“Reports of intimidation and harassment are greatly concerning. It’s never acceptable, and we must be unequivocal as a community in condemning such actions.
“I have been engaging with the PSNI about these matters as they have developed and will be raising it at the earliest opportunity with the chief constable at the Policing Board.”
The patrols come after two summers of violence in the north sparked by anti-migration protests which saw the businesses and homes of immigrants attacked and disorder on the streets of Belfast, Ballymena and other areas.
New figures this week reported by The Detail show that almost half of those arrested in connection with race-related disorder that broke out in Belfast last summer had previously been reported to police for domestic abuse.
The PSNI says it is aware of videos circulating on social media and that it “does not tolerate any type of vigilante activity”.
It added it “would caution any individual or group against taking the law into their own hands”.
“It is the responsibility of the police service to enforce the law in Northern Ireland and we are committed to supporting the needs of all of our diverse communities.
“We will robustly review and deal with any offences reported to us.”
A spokesperson for the Department of Justice said “a range of measures are in place to support vulnerable groups from threatening and violent behaviour”.
“The minister has always been very clear there is no place for hate in any part of our society,” the spokesperson said.
“The Department of Justice, together with the Northern Ireland Policing Board, provides annual funding to Policing and Community Safety Partnerships to address local community safety issues, including hate crime, in each of the council areas.
“In addition, the Department of Justice jointly fund the Hate Crime Advocacy Service with the PSNI, to assist reporting of hate incidents to the police and provide support to victims throughout the investigative/criminal justice system process.
“If any individual suspects that a crime has been committed, I would encourage them to report it to the PSNI.”