The Saint John Police Force has ordered members to stop wearing thin blue line patches following social media posts of officers sporting the controversial patch.
Tweets posted on Thursday show Saint John police officers wearing the patches at King's Square on July 3, while on duty at a protest related to former residential schools.
The patch has acquired various connotations. Some supporters say wearing the patch is a sign of solidarity among officers, but critics say it fosters a dangerous sense of opposition between police officers and civilians.
Community members say the protest on July 3 was about bringing awareness to the damage done by colonialism, following the discovery of unmarked graves of Indigenous children at the sites of former residential schools.
The protest also followed the vandalization of the statue of Sir Samuel Leonard Tilley in the square.