Authorities have ruled out any criminal wrongdoing over Formula One star Michael Schumacher's ski accident, a French prosecutor leading the investigation has said.

The office of Albertville prosecutor Patrick Quincy said in a statement today that "no infraction by anyone has been turned up".

Schumacher, 45, suffered serious head injuries when he fell and hit the right side of his head on a rock off the side of a demarcated slope in the French ski resort of Meribel on December 29. The German has been treated in Grenoble University Hospital since then.

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Schumacher's doctors have started waking him from an induced coma. A statement from his spokeswoman declined to provide further details about his health, citing privacy concerns.