The arrest of a man earlier this week in the Albion Road and Finch Avenue area has resulted in the Special Investigations Unit being called in.
On Tuesday afternoon, around 4:45 p.m., an undercover Toronto police officer was conducting an investigation on Kendleton Drive near Opal Court.
The officer had an interaction with two men who were outside of a home; both were arrested with the help of some other officers.
As a result, a 19 year old man was taken to hospital with serious facial injuries.
Any witnesses are being asked to come forward.