Quebec-based SNC-Lavalin Group has dismissed two employees with ties to al-Saadi Gadhafi, the son of former Libyan dictator Moammar Gadhafi, who is wanted on an international arrest warrant.

Riadh Ben Aissa, formerly the executive vice-president of the company, and Stephane Roy, who was a controller, are "no longer in the employ of the company, effective immediately," stated a release from the company published Thursday. 

SNC-Lavalin offered few details about the reasons for the dismissals, saying only that "questions regarding the conduct of SNC-Lavalin employees have recently been the focus of public attention."

"SNC-Lavalin reiterates that all employees must comply with our Code of Ethics and Business Conduct."

The Montreal-based engineering and construction firm has offices in Canada and 40 other countries around the world, and is currently working in roughly 100 countries, according to the news release.

SNC-Lavalin has done extensive work in Libya, which experienced a massive Arab Spring uprising last year that led to clashes between demonstrators and the military, and eventually the death of dictator Moammar Gadhafi.

According to reports, Aissa had worked extensively in Libya on projects worth hundreds of millions of dollars.

He also helped al-Saadi Gadhafi set up the Libyan Corps of Engineers and there are reports he flew a Canadian security specialist to Libya to help Gadhafi when tensions were at their highest last year.

Roy has been linked to an alleged plot to help smuggle Gadhafi into Mexico. Mexican authorities recently charged an Ontario woman, Cynthia Vanier, with masterminding the James Bond-style scheme which involved private planes, forged passports and a safehouse.

Vanier was arrested in November with a Dane and two Mexicans. She has been held in a Mexican prison ever since. SNC-Lavalin has only recently acknowledged that Roy was also with Vanier at the time of her arrest, though police did not take action against him.

The company said Roy was in Mexico to discuss water treatment projects with Vanier.

SNC-Lavalin has also acknowledged it hired Vanier's Mount Forest, Ont.-based mediation firm last summer to look at the security situation in Libya and determine whether the company could return to work there.

Gadhafi eventually escaped Libya and was granted asylum in Niger. He is still subject to an Interpol warrant for his arrest.