Two Toronto police officers have been accused of assaulting a man who was arrested following an altercation with a parking enforcement officer.

The two constables have been charged following an investigation by Ontario's Special Investigations Unit.

SIU Director Ian Scott said in a statement on Thursday that the incident occurred on April 24, 2011, after police responded to an altercation between a man and Devon Henry, a parking enforcement officer.

The SIU says that Keith Ryan was arrested after arguing with Henry and taken to 14 Division.

Later the same day, Ryan was taken to St. Michael's Hospital and was diagnosed with facial fractures.

The SIU said on Thursday that they had reason to believe Ryan was assaulted while in police custody.

Const. Manpreet Kharbar and Const. Paul Ramos have been charged with assault causing bodily harm.

They are required to appear before the Ontario Court of Justice at Old City Hall, 60 Queen St. W. in Toronto on August 24, 2011.

Henry, the parking attendant, had previously been charged with assault in connection with the same incident and was not the focus of the SIU investigation.

The SIU is an arm's-length agency that investigates cases where people have been injured or died as a result of contact with police.