Tributes have begun pouring in for Barry Sherman, founder of the pharmaceutical company Apotex, and his wife, Honey, after they were found in their Toronto home.
Const. David Hopkinson said emergency crews were dispatched out as a medical call initially to the Sherman home, located on Old Colony Road near Bayview Avenue and Highway 401, just before 11:45 a.m. Friday.
He declined to say whether the bodies showed signs of trauma and did not provide details on the time or cause of death.
Mr Sherman was the chairman of generic drug-maker Apotex, which he founded in 1974 with two employees.
Canadian Business magazine recently listed Barry Sherman as the 15th richest person in Canada, with a net worth of $4.77 billion.
Authorities have not said who made the call, though Canadian media reported the couple's bodies were found by a real estate agent helping them sell their home, which was on the market for $C6.9 million (about $A7 million). Their bodies were discovered Friday morning, and investigators said there appeared to be no danger to the community at large, and no suspects were being sought.
Homicide detectives later told reporters gathered outside the home that there were no signs of forced entry
Speaking with reporters about the couple on Saturday morning, Mayor John Tory said they were "extraordinary citizens" who "contributed so much to so many in Toronto".
Taylor said that a "death investigation" is taking place and that the coroner is investigating. Neighbours confirmed that the property was the couple's home.
Prime Minister Justin Trudeau said he was "saddened by news of the sudden passing".
Sherman has also been an active philanthropist, including donating $50 million to the United Jewish Appeal. "Barry Sherman was a more reserved man but a man who over his business career created hundreds and hundreds of jobs for people in the City of Toronto and he loyally invested in the City of Toronto, keeping a lot of the manufacturing and other operations of Apotex here in the city".
Police have not released any names but the province's Health Minister Eric Hoskins, tweeted about the deaths writing "I am beyond words right now. A very, very sad day", he wrote.