Couple found dead in western Sydney home

Police are working to establish if there were any suspicious circumstances surrounding the deaths of a man and woman who were found in their Sydney home.

A 39-year-old man has been stabbed in the chest at his home in Whalan. (AAP) Source: AAP

A man and woman have been found dead inside a western Sydney home.

Police say a four-year-old girl who was sleeping inside the Smithfield home when the bodies were found by a relative on Sunday afternoon was unharmed.

Detectives are still working to identify the pair and it's not yet known if the deaths are being treated as suspicious.