(NBC News) Did Oscar-winning actor Russell Crowe really capture photos of a UFO outside his office in Australia, passing over Sydney’s Royal Botanic Gardens? Or was it just a yacht passing by?

In a series of Twitter updates, Crowe — who won the best-actor Oscar for his role in “Gladiator” and recently starred in another Oscar-nominated film, “Les Miserables” — insists that the pictures are real and that they don’t show reflections or lens flare. What the YouTube video does show is a series of three time-lapse photos, with a flat red light moving across the frame.

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