Toronto billionaire couple found dead at their home

Toronto billionaire couple found dead at their home

Police have said the circumstances of the deaths "appear suspicious".

Results of a postmortem examination will indicate whether the Shermans' deaths will be investigated as a homicide, Hopkinson said.

During a news conference Friday, Constable David Hopkinson would not identify the two bodies.

Canadian Prime Minister Justin Trudeau tweeted that he was saddened to by the news of the sudden passing of Barry and his wife Honey.

"All of us at Apotex are deeply shocked and saddened by this news and our thoughts and prayers are with the family at this time", the company said in a statement.

A police spokesman said emergency services were called to the house just before noon on Friday.

Police later said there were no signs of forced entry at the property and they were not now searching for a suspect, according to CBC.

A real estate agent discovered the bodies in the basement while preparing for an open house, the Toronto Globe and Mail reported, citing a relative.

Mr Sherman, 75, was a prominent donor to Canada's ruling Liberal Party, drawing on a fortune that Forbes estimated at $US3.2 billion ($A4.5 billion). The company produces and exports generic drugs to more than 115 countries worldwide, according to its website.

Apotex employs more than 10,000 people in research, development, manufacturing and distribution facilities worldwide, with more than 6,000 employees at its Canadian operations, CTV reported.

"Wonderful human beings, incredible philanthropists, great leaders in health care".

"Patients around the world live healthier and more fulfilled lives thanks to his life's work, and his significant impact on healthcare and healthcare sustainability will have an enduring impact for many years to come", the statement read. "As employees, we are proud of his tremendous accomplishments, honored to have known him, and vow to carry on with the Apotex goal in his honor".

Sherman's wife, Honey, was a member of the board of the Baycrest Foundation and the York University Foundation. The couple had made numerous multimillion dollar donations to hospitals, schools, and charities.

His home was recently put up for sale.

Sarah Alvi lives with her family across the road from the Sherman home and has known the couple for four years.