KINGSTON, ONT.—The province’s police watchdog is investigating after a 52-year-old man died in Kingston on Monday.

The Special Investigations Unit says Kingston police officers responded to a call for an assault around 3 p.m. on Monday.

They say the force’s tactical team also attended and police entered the home around 10:30 p.m.

The SIU says the man was pronounced dead at the scene.

Kingston police tweeted they deployed a large “distraction device” during the incident.

The SIU is an arm’s length agency that investigates reports involving police where there has been a death, serious injury or allegations of sexual assault.

Note: An earlier version of this story incorrectly said police responded to the assault call on Tuesday.