The Special Investigations Unit has been called in after a 36-year old man was injured in an altercation with police this week.

Just after midnight on Thursday, Sudbury Police were called to the Lloyd and Mathew Street area.

While a male suspect was being arrested there was an altercation and the man had to be taken to hospital with a shoulder injury.

The SIU investigates reports involving police where there has been death, serious injury or allegations of sexual assault.