MISSISSAUGA, Ont. - Ontario's police watchdog says a Toronto police officer has been charged in connection with injuries suffered by a man during an arrest three years ago.

The Special Investigations Unit says it launched its probe into the April 2010 arrest of Rudolph Raymond Costain, 30, after learning of the incident through media reports this March.

The SIU says its investigation determined Costain was struck a number of times by an officer during his arrest on April 12, 2010, in Toronto.

He was taken to St. Michael's Hospital for treatment of head injuries.

Const. Christian Dobbs is facing one charge of assault causing bodily harm and is to appear before the Ontario Court of Justice in Toronto on July 17.

The watchdog agency says it will have no further comment on the case as the matter is now before the courts.