For the third day in a row, Quebec’s anti-corruption squad is carrying out a raid in Montreal.

Police officers descended on the home of former Union Montreal financial chief Bernard Trepanier Thursday morning.

Spokesperson Anne-Frederique Laurence says 10 police officers working with UPAC are at a Montreal home collecting evidence. No arrests have been made.

UPAC has carried out a number of raids in the past month, and while they are keeping mum about what the raids are linked to, the companies and people targeted were all somehow involved in the saga of the city’s cancelled $355-million water meter contract.

Trepanier is now famously nicknamed "Mr. Three Per Cent," for the cut he allegedly demanded as a political contribution in return for city contracts.

During his testimony at the Charbonneau Commission, Trepanier said he worked as a lobbyist for several companies, although he confessed that he was never officially registered as a lobbyist, as required by law.

One of his clients was the Dessau Engineering firm, which landed the water meter contract from the city.

UPAC officers were at former Montreal mayor Gerald Tremblay’s home and country house in the Laurentians Wednesday, and raided the offices of Morrow Communications, a firm owned by Tremblay's former campaign manager, on Tuesday.