Thunder Bay Police officers were dispatched to the 800-block area of McMillan Street following a weapons call Friday afternoon.
When police arrived, they located a deceased adult male.
A large police presence remains in the area and a scene is being held. The public is being asked to avoid this area until further notice.
No further information is available at this time.
If you have any information that could assist investigators, please call police at 684-1200. You can submit tips anonymously through Crime Stoppers at 1-800-222-8477, online at www.p3tips.com.