Advocates concerned about a lack of diversity among civil servants in Boston will host a community forum focused on the city's police and fire departments on Tuesday, June 20.

The event is organized by the Boston Branch of the NAACP, the Massachusetts Association of Minority ​Law Enforcement Officers (MAMLEO), the Boston Society of Vulcans, and the Lawyers’ Committee for Civil Rights and Economic Justice.

Organizers say they hope to address three questions: whether the city is actively impeding progress on diversity, whether it is failing to take proactive steps, and what citizens can do to move forward.

The forum will start at 5:30 p.m. at the MAMLEO headquarters, 61 Columbia Rd. in Dorchester.

A flyer being circulated by the four organizations to promote the event reads: “Boston can and must do better to increase racial diversity.” They cite a Boston Globe story from last October that reported that 75 percent of new police officers and 90 percent of new firefighters under Mayor Martin J. Walsh’s administration are white.

The joint statement also said that nearly one in three black residents say they do not believe that Boston police treat communities of color fairly.