Police in Sault Ste. Marie say a man who killed four people, including three children, before taking his own life had been involved in intimate partner investigations in the past.
Investigators have said the shootings that took place in the northern Ontario city Monday night were the result of intimate partner violence.
Police Chief Hugh Stevenson says police got a call on Sunday about what ``could be perceived as domestic violence'' at one of the two homes where the shootings took place.
Stevenson provided few other details about the previous investigations.
Police have said a man, who investigators have not named, broke into a home and killed a 41-year-old woman before heading to a second home and killing three children, aged six, seven and 12, and shooting another woman, who survived.
Police say the 44-year-old shooter was found dead of a self-inflicted gunshot.