TORONTO -- Ontario's police watchdog is reviewing how the OPP handled the death of a man in the community of Grand Bend this weekend.

The Special Investigations Unit says officers drove a 52-year-old man home from a bar and restaurant early Sunday morning.

The SIU says the man went into medical distress and was pronounced dead.

An autopsy will be done on Monday.

The SIU is automatically called in whenever police are involved in a situation that results in death or serious injury.

Grand Bend is on the shores of Lake Huron.