Sanitation workers in Philadelphia could go on strike as soon as Tuesday, stopping regular residential trash pickup in the city.

Philadelphia set up over 60 drop-off sites for residents to bring their garbage as collection workers strike. Thousands of city workers in Philadelphia went on strike shortly after midnight Tuesday, a move that threatens to disrupt a number of municipal services.

While police and firefighters are not on strike, many of the city's blue-collar workers, such as trash collectors, are, according to Reuters.