Ontario's police watchdog is looking into the death of a 45-year-old man in Hamilton.

The Special Investigations Unit says Hamilton police responded to a domestic call late Saturday morning.

The SIU says police have reported that while arresting the man they discovered he had suffered injuries.

The man was taken to hospital but was pronounced dead.

A woman was also treated for non-life threatening injuries.

The SIU says it is reviewing the actions of three officers in connection with the case.