Carbon monoxide poisoning is suspected in the deaths of two seniors whose bodies were found in a west-end Toronto home Sunday night.
Fire officials say high levels of the deadly gas were detected in the residence.
Police say the received a call about two people in the home who were unconscious and not breathing.
Paramedics said a man and a woman in their 80s were found without vital signs and all attempts to resuscitate them failed.
The coroner has been notified and a fire investigator has been assigned to determine the source of the carbon monoxide.
The names of the deceased were not immediately released.