A report of a group of people dressed as Ku Klux Klan (KKK) members in Newtownards, County Down, is being treated by police as a hate crime.
Pictures emerged of the group posing near an Islamic prayer house.
The pictures were taken on Saturday night on Greenwell Street. The incident was reported to police at about 17:00 GMT on Sunday.
Strangford MLAs have condemned the incident.
PSNI Insp Richard Murray said: "Hate crime, in all its forms, is totally unacceptable.
The Chief Constable, George Hamilton, told BBC NI's The Nolan Show the incident was "disgusting and distasteful".
"There's no place for it anywhere in Northern Ireland. We will investigate it and report the evidence to the PPS," he added. [BBC] Read more