The death of Sage Stallone -- Sly's son -- is now in the hands of LAPD Robbery Homicide detectives ... law enforcement sources tell TMZ.
We're told the move in no way suggests foul play. Robbery Homicide handles high-profile cases, and this one qualifies.
Sources tell us ... although it will probably take 4 weeks to get a firm cause of death, it's likely that it will either be classified as an accidental death or death from natural causes.
As we reported, a number of pill bottles were found in Sage's bedroom where he died.