The mayor of Saint-Constant, Que., and his son were among people targeted by the province's anti-corruption unit in a series of raids south of Montreal on Wednesday morning.

Radio-Canada reports the home of Gilles Pepin and offices at City Hall were searched by investigators with the permanent anti-corruption unit (UPAC) starting just after 8 a.m. ET. No arrests are expected.

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Gilles Pepin and his administration have been under investigation by the squad for several months. (Radio-Canada)

A business owned by Pepin and his son was also searched.

UPAC spokeswoman Anne-Frederick Laurence confirmed the anti-corruption squad was conducting raids at several locations in Saint-Constant.

Laurence said the nature of their investigations require that many details remain confidential.

Pepin spoke to reporters near his home Wednesday morning and said he was shocked by the raids. He said it was harassment and amounted to a "fishing expedition."

The Municipal Affairs Ministry has been looking into city contracts for the past 17 months and has found no evidence of wrongdoing, he said.

Pepin and some members of his administration have previously faced allegations of violating the elections act.

In 2007, Pepin and five of his councillors were removed and the election results thrown out after a Superior Court found they had exceeded the allowable campaign-spending limit.

He was later re-elected.

Last year, Quebec’s chief electoral officer opened an investigation after other allegations of election act violations surfaced. In November, Pepin was accused of collecting money himself, a task usually reserved for an official agent during the 2008 election campaign. Pepin denied the allegations.

It's not clear if the search warrants are connected to that investigation.

The anti-corruption unit began investigating Pepin’s administration several weeks ago.