Toronto police are treating the deaths of a father and son whose bodies were recovered from a residential fire on Wednesday afternoon as suspicious.

A call came in at 1:30 p.m. for a fire at 10 Jeffton Crescent, near Markham Road and Ellesmere Road, and when firefighters arrived the blaze had extinguished itself.

Police said the bodies of a 87-year-old father and his 56-year-old son were discovered inside home.

The fire marshal has been called in to investigate.