ST. LOUIS — The city police department’s internal affairs division is investigating allegations that some current and former police officers made racist, violent and anti-Muslim Facebook posts.

Mayor Lyda Krewson on Monday called the reported Facebook posts “disturbing and unacceptable” and the Missouri chapter of the Council on American-Islamic Relations (CAIR) is demanding that city police go through sensitivity training.

The posts were disclosed by a Philadelphia-based organization called the Plain View Project in a study of Facebook posts by current and former officers in St. Louis and seven other jurisdictions around the country.

The group’s database surveyed more than 5,000 Facebook posts from 3,500 Facebook accounts of current and former officers in the eight departments.

The research project began in 2017 and used rosters of police officers and then verified their Facebook accounts, according to the group’s website.

Forty-three accounts are tied to St. Louis police officers on the Plain View site, according to the project’s founder, Emily Baker-White. Twenty-two of those are tied to current police officers with the metropolitan police department, and 21 of them are former officers.