Edward "Umaga" Fatu passed away around 6PM EST in a Houston hospital yesterday. Apparently he suffered his second heart attack in 24 hours after being found on the floor that morning by his wife and didn't make it through. He was 36.
WWE has confirmed Fatu's passing on their website with the following:
WWE would like to express its deepest condolences to Mr. Fatu’s family, friends and fans on his tragic passing. Mr. Fatu was under contract with WWE at various time periods and most recently performed under the name "Umaga." Mr. Fatu's contract was terminated on June 11, 2009.