Sylvester Stallone's Son Sage Found Dead

Sage Stallone, the 36-year-old son of Sylvester Stallone, has been found dead at a house in Los Angeles.

Authorities were investigating Sage Stallone's death, but details were not immediately available.

"Sylvester Stallone is devastated and grief-stricken over the sudden loss of his son," publicist Michelle Bega said in a statement. "His compassion and thoughts are with Sage's mother, Sasha."

Los Angeles police said they were dispatched to investigate a death at a home on Mulholland Terrace around 2.15pm on Friday.The Post reports that his mother, Sasha Czack, had also been notified of her son's passing. Stallone made his acting debut alongside his father in "Rocky V." He went on to act in a number of films, most recently in "Promises Written in Water" in 2010 (he also appeared in "The Agent," a short, and in a 2011 television documentary episode on the Rocky films).

Sylvester Stallone was in San Diego Thursday to promote "Expendables 2," his new film with Arnold Schwarzenegger. The actors spoke on a panel in Hall H at Comic-Con.