ST. LOUIS — The city’s police union on Friday accused city leaders of “bad faith bargaining” and refusing to continue discussions over wage increases.

The St. Louis Police Officers Association said it also had asked in an “emergency grievance” for a federal mediator to get involved.

A news release issued by the association said that the city is diverting to other uses about $2 million from police salaries from a sales tax increase approved by voters in 2017.

Mayor Lyda Krewson declined to comment Friday, saying she had not yet read the union’s statement. City Personnel Director Rick Frank and Public Safety Director Jimmie Edwards could not be reached for comment.

The union also alleged that the mayor’s office worked against an effort on the Board of Aldermen to provide a $2,000 retention bonus for police officers in the city budget for the fiscal year beginning July 1.

Jeff Roorda, the association’s business manager, said that would have cost an estimated $1.8 million.