Police were hunting for clues Saturday after the pharmaceutical billionaire Barry Sherman and his wife Honey were found dead in the basement of their Toronto home, in what investigators reportedly suspect was a murder-suicide.

Investigators were still at the scene in the evening hours, a sprawling home in a tony neighborhood of Canada's largest city, with post-mortem examinations under way to help determine how the couple died.

Police labeled the deaths "suspicious" after the bodies were discovered Friday, but clarified that no suspects were being sought.

The Toronto Sun and The Globe and Mail both reported that the deaths of the couple -- who counted among Canada's richest people and were known as charity fundraisers -- were being probed as a possible murder-suicide.