Police say a six-year-old boy and his father found dead in a home west of Toronto were killed in a murder-suicide.

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Police are probing the deaths of a father and son whose bodies were found in a semi-detached home in Milton, Ont., on Saturday, Sept. 8, 2012. (Natalie Kalata/CBC)

The two were discovered by police around 1:20 p.m. Saturday inside a semi-detached house on Clark Boulevard in Milton, Ont.

Halton Regional Police made the announcement following autopsies performed Sunday on Wojciech Kosalka, 43, and his son Noah.

Police say the cause of death has been established but will not be made public.

The force's homicide squad and forensics team continue to investigate the incident.