Montreal Mayor Michael Applebaum and two others were arrested by Quebec's anti-corruption task force on Monday.
The arrest leaves Montreal's City Hall in disarray and raises more questions about corruption in that province.
On Twitter, many Torontonians tried to draw comparisons between Applebaum and Toronto Mayor Rob Ford, who is facing his own scandal.
See some of the best reactions on Twitter. Story continues after slideshow:
Applebaum is just the latest Quebec mayor to be arrested by the anti-corruption unit.
Gilles Vaillancourt, the former longtime mayor of Laval, was arrested in a sweep last month and charged with fraud and gangsterism.
Applebaum was elected by Montreal's city council to serve as mayor after Gerald Tremblay stepped down last fall amid corruption allegations.
With files from the Canadian Press