Early Sunday morning, police were alerted of a trespasser in a downtown establishment.
Police arrived at the 500-block of Richmond Street just before 2:30am and asked the male to leave the premises.
The male allegedly returned with a knife while becoming assertive with police during his arrest.
Upon being arrested, the suspect was found to have serious, non-life threatening injuries.
As a result of the incident, a 22-year-old man from London was charged with two counts of assault, a dangerous weapon, resisting arrest and uttering threats.
Officers were not injured but the suspect was taken to hospital. The Special Investigations Unit has invoked their mandate.