Sage Stallone killed by heart attack, says coroner

Father and son ... Sage and Sly Stallone many years ago

SYLVESTER Stallone's son Sage died from natural causes due to a heart condition, it has been confirmed.

The 36-year-old, from Sly's first marriage to Sasha Czack, was found dead at his Hollywood apartment on July 13.
Despite earlier allegations of drug use, none were found in his system at the time of death, according to the Los Angeles County Coroner.
Officials said on Thursday that Sage passed away due to a condition that causes blockage of the arteries.
A source told TMZ, it was "unusual" for a person Sage's age to have such advanced coronary problems.
An initial autopsy on Sage's body proved inconclusive.

Back to work ... Sylvester Stallone made it to the Expendables 2 premiere in London earlier this month

Following Sage's tragic passing, Sly was left "devastated" and "grief-stricken" by his loss and missed several promotional events for his film The Expendables 2.
He said: "When a parent loses a child, there is no greater pain.
"Therefore I am imploring people to respect my talented son's memory and feel compassion for his loving mother, Sasha."
He also "begged" for the memory and soul of Sage – who played the actor's on-screen son in 1990 movie Rocky V – to be "left in peace" amid speculation of how he died.
He added: "This loss will be felt for the rest of our lives. Sage was our first child and the centre of our universe. I am humbly begging for all to have my son's memory and soul left in peace."
Earlier this week, Sly, who made it to the London premiere of the Expendables 2 earlier this month, was rocked by another family tragedy when his half-sister died.
Toni Ann Filiti lost her battle with lung cancer at their mum Jackie’s Santa Monica, California, home on Sunday. She was 48.