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MIAMI (CBSMiami) — Six firefighters have been fired from their job for their alleged involvement in a distasteful display of racism and bigotry.

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On Sept. 9, a noose was hung over a black colleague’s family photos and lewd images were drawn on pictures of his wife, mother and kids, according to a report from CBS4 news partner The Miami Herald.

Fire department executives interviewed more than 20 people and nearly a dozen firefighters were investigated. Sources with the newspaper said the noose was created out of twine and hung over the family photo of the black lieutenant.

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Five other firefighters remain under scrutiny.

In Pompano Beach earlier this year, three firefighter recruits resigned and another was fired after a similar stunt on the last day of firefighting school.

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The city of Miami will hold a press conference Friday morning to discuss the firings.