MONTREAL - The Surete du Quebec has fired the private security company that looks after its headquarters the same week as the company was dumped by the city of Montreal.

The company, Secur-Action, also has contracts with companies owned by Tony Accurso. Accurso owns construction firms that are part of the SQ's investigation into corruption in Quebec's construction industry.

For months, Secur-Action looked after security at the Montreal courthouse on Notre Dame St. and the Montreal police force's headquarters on St. Urbain St. until a recent background check.

Though neither the SPVM or the SQ would disclose the reason for the firing, they both say no breach of security took place.

"For us we've decided not to go further with them with a contract. That's all we have to say about it," said Montreal police const. Ian Lafreniere.

Following the Montreal firing, the SQ followed suit, terminating Secur-Action's contract, which began in 2007, at 5 p.m. Wednesday.

SQ police officers will provide security for the headquarters on Parthenais St. while a replacement is found.

Secur-Action owner Eric Beaupre told CTV Montreal he plans to sue for breach of contract, because his company was dropped without an explanation.

Beaupre admitted, however, another security company he owns has a contract with a group that's partly owned by Tony Accurso, but said he sees no problem with the relationship.

"I have ties to him the same way as I have ties to any other client," he said. "There's nothing illegal about it."

In a written statement to CTV, Tony Accurso said: "I have no business ties to Secur or this man. I am not a partner in the company and have not invested in the company. I have no financial ties to the company or the owner. I only know the owner of the company because he is my son's friend"