Celebrity bodybuilding champion Rich Piana has died two weeks after he was placed in a medically induced coma.

The 46-year-old's death was confirmed on Friday morning in a Facebook post by his estranged wife Sara Piana.

She wrote: "I'm in tears writing this that @1dayumay has just passed away.

"I can barely believe this... I am so saddened & heartbroken that he didn't make it."