The LA Times and TMZ, which first reported the Friends actor had died, said the star was found unresponsive in a hot tub at his house on Saturday.
Perry's post-mortem examination was inconclusive, while officials await the results of toxicology tests.
There were no obvious signs of trauma, an LA Police spokesperson confirmed to CBS News, the BBC's US partner.
The LA County Medical Examiner's office updated their file on Sunday to say the case had been deferred.
This usually means that the post-mortem is complete but more detail is needed.