(CNN) Toronto billionaire and philanthropist Barry Sherman and his wife were found dead in their mansion Friday afternoon, CNN affiliate CTV reports.

The Toronto Police Service is investigating the deaths as "suspicious."

On Sunday police released a statement saying autopsies determined that the cause of death for both Barry and Honey Sherman was "ligature neck compressions." The police statement did not elaborate beyond that wording.

During a press conference Friday, Constable David Hopkinson said police, fire units and ambulance responded to a "medical complaint" just before noon on Friday.

Ontario politicians who spoke out on social media said the deceased were generous philanthropists.

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