Police investigators are trying to determine what happened to a man who was found, seriously injured, unconscious and bleeding Friday morning in the back yard of a Roosevelt home.

It was not clear what happened to the 45-year-old man, but police said they suspect he is the victim of a crime.

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Get the latest news and more great videos at NewsdayTV Credit: Newsday

Updated 54 minutes ago Boaters feeling pinch at pump ... Weekend weather outlook ... USA 250: Burning of the hay ... FeedMe: Sandbox food trucks ... Get the latest news and more great videos at NewsdayTV

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