The firefighters union has launched an extraordinary attempt to block the release of an investigation into workplace bullying, sexism, discrimination and harassment in Victorian firefighting services.

The Victorian Equal Opportunity and Human Rights Commission was asked by the Andrews government to investigate the workplace culture of the MFB and CFA last year and the findings are due to be released soon.

United Firefighters Union secretary Peter Marshall. Credit:Justin McManus

The United Firefighters Union had sought an urgent injunction in the Supreme Court to have the report suppressed. However, the matter has now been adjourned with no further hearings set.

Allegations of bullying and discrimination have been levelled at the CFA and MFB for some time. The Commission's investigation was triggered as a result of the Fire Services Review which reported early last year.