Investigators from Quebec's anti-corruption unit are searching the home of former Montreal mayor Gerald Tremblay as part of their probe into a water meter contract.
Montreal awarded the $355-million contract to a consortium in 2007 but cancelled the deal a few years later after reports surfaced of alleged embezzlement and other irregularities.
Tremblay was mayor between 2002 and 2012.
While a spokeswoman for the unit is not confirming that Tremblay's residence is the subject of the search, a Quebec provincial police cruiser is parked in his driveway and investigators were seen removing boxes from the home.
Anti-corruption officials from the unit have been conducting raids related to the water meter contract over the last few weeks.
Sources last week said officers visited the home of Claude Dauphin, borough mayor of Lachine, as well as the residence of Sammy Forcillo, the city's ex-head of water management.
Dauphin was head of the Federation of Canadian Municipalities between June 2013 and last month.