The Toronto Transit Commission says it has fired four more employees in relation to a benefits scam first made public in July.

Police allege the owner of Healthy Fit, a Wilson Heights-based orthotics retailer convinced select TTC workers to claim the cost of orthotic devices that were never actually purchased.

“It is alleged that receipts were provided to individuals by Healthy Fit for claim reimbursement where no product or service was obtained, or where receipt amounts were inflated,” the commission said in a news release on Wednesday.

TTC CEO Andy Byford alleged in July that the business owner and workers who participated in the alleged scam would share the proceeds of the fraudulent claims.

The scam eventually cost the TTC and its benefits provider, Manulife Financial, more than $4 million. Authorities said a tip line set up by the TTC two years ago called “Integrity” provided the information that led to the discovery of the alleged fraud.

The owner of Healthy Fit and two employees were charged with fraud over $5,000 and laundering the proceeds of crime in July.

In October, a TTC supervisor was dismissed in connection to the fraud. None of the five employees dismissed by the commission to date have been charged criminally. The TTC says it will demand full repayment from any employee found to have participated in the scam.

"It is only right that we take a very tough line on dealing with this matter," Byford said in a message sent to all TTC employees today. "Not only does this put our benefits package at risk, it also undermines the credibility and honesty of each and every one of us in the eyes of the public, just as we are working so hard to restore our reputation."

An investigation into the alleged fraud continues, and the commission says “more employees will face discipline, up to and including dismissal.”