Montreal Mayor Michael Applebaum,(L) arrives at the provincial police headquarters shortly after his arrest on June 17, 2013. Applebaum was arrested Monday and will be questioned by the Canadian province's anti-corruption unit later in the day, said a source close to the investigation. His arrest comes amid a probe into several corruption scandals that have shaken Quebec's largest city for more than a year and that led the former mayor to resign in November. Quebec's anti-corruption squad in February raided Montreal city hall, asking employees to leave the building as they searched through files.