Ottawa Police Service. (QMI Agency File Photo)

OTTAWA - Ontario's Special Investigations Unit (SIU) is probing the circumstances surrounding the death of a 47-year-old man in Ottawa Thursday night.

Around 9:15 p.m. Ottawa cops responded to an apartment building at 2651 Regina St. in Lincoln Fields.

The officers "interacted" with the man, who was in an apartment on the 12th floor, according to the SIU.