Jul 13 2012 8:17 PM EDT 0

Sylvester Stallone's Son Sage Found Dead

Sage Stallone, son of famed action star Sylvester Stallone, was found dead Friday (July 13), according to TMZ. He was 36 years old.

While many of the details surrounding Sage Stallone's death remain unclear, a source told the outlet that an overdose of pills was the cause of death, but L.A. police are still trying to determine whether the overdose was intentional or an accident. He was reportedly found by his girlfriend.