Ontario’s police watchdog has charged a York Regional Police officer with assault in connection with the arrest of a man in April.

The Special Investigations Unit said in a release that several York officers ran into a 30-year-old man during an investigation on April 5 in Keswick.

An unspecified “interaction” happened and, according to the SIU, the man was diagnosed with a serious injury the following morning.

Const. Wesley Ollson, 39, faces one count of assault causing bodily harm.

He is due in a Newmarket courtroom on Oct. 3.