Transcript for Investigation begins into car accident involving Prince Philip

Overseas we're learning more details about the crash involving prince Phillip. He was behind the wheel. James Longman again tonight from London. Reporter: He's been called the iron duke, and tonight its clear why. 97-year-old prince Phillip was pulled unhurt from the window of this overturned wreck, after he crashed into another car near the queen's sandringham estate. As he recovers by, his wife, the queen's side, an investigation has begun into who is at fault. I saw the car rolling across the road, tumbling across the a149. Reporter: Ray worne was driving past when he spotted the crash and rushed to help free the prince. It was an astonishing escape for everyone. It looked like as is it had been an extraordinarily severe, severe injuries. Reporter: In the other car, two women and 9 month old baby. One of the women with a broken wrist, but miraculously no more serious injuries have been reported. The prince tonight has reached out privately to both women. The palace has released very little information, and they're unlikely to respond to the question everyone is asking, is it safe for the prince to keep driving? David? James Longman, thanks. We have learned the names of

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