The city’s biggest police union has filed a lawsuit in Staten Island state Supreme Court to try to overturn the mayor’s vaccine mandate for city workers.

The Police Benevolent Association announcement came on the same day that hundreds of demonstrators marched across the Brooklyn Bridge to City Hall to protest the mandate.

The PBA also says it will file a request for a temporary restraining order to stop the mandate from being implemented while the suit is pending.

Police officers were originally able to opt out of taking the vaccine by being tested, but after the city announced a vaccination mandate for all city workers last week, officers now have until end of day Friday to show proof of vaccination. 

In response, a city Law Department spokesperson issued a statement, which reads, "Every effort to stop the City's vaccine mandates has failed in court, and we believe this suit by the PBA will meet the same fate. The City's vaccine mandates are lawful and keep New Yorkers safe. We'll review the case."